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    FAQ/Walkthrough by KeeperBvK

    Version: 1.22 | Updated: 02/08/12 | Search Guide | Bookmark Guide

    Half-Life 2 (PC) guide
    by KeeperBvK aka Burkhart von Klitzing
    Contact: KeeperBvK@web.de
    Dedication: I dedicate this work to my beloved dad who already passed away.
                I always loved you and I always will. Thank you so much for the  
                time we had.
                                   0.1 Legal Stuff
    This Guide may not be posted on any other website other than 
    without my permission and it may not be used commercially in any possible way.
    If you want to post it on another site please contact me via E-Mail or via the 
    Message Board.
    Do not claim this guide or any part of it to be your creation.
    If you find any mistakes (even regarding the language as I'm German) please 
    let me know.
    Copyright 2012 Burkhart von Klitzing
                                    0.2 Contents
                                                   | Latest Update | Search Key |
    0.1 Legal Stuff                                |      1.22     |            |
    0.2 Contents                                   |      1.22     |            |
    1. What is Half-Life 2?                        |      1.0      |     AAA    |
    2. General Hints                               |      1.0      |     BBB    |
    3. Walkthrough                                 |      1.0      |     CCC    |
      3.1 Chapter 1 - Point Insertion              |      1.0      |     CC1    |
      3.2 Chapter 2 - A Red Letter Day             |      1.0      |     CC2    |
      3.3 Chapter 3 - Route Kanal                  |      1.20     |     CC3    |
      3.4 Chapter 4 - Water Hazard                 |      1.21     |     CC4    |
      3.5 Chapter 5 - Black Mesa East              |      1.20     |     CC5    |
      3.6 Chapter 6 - "We don't go to Ravenholm..."|      1.20     |     CC6    |
      3.7 Chapter 7 - Highway 17                   |      1.20     |     CC7    |
      3.8 Chapter 8 - Sandtraps                    |      1.20     |     CC8    |
      3.9 Chapter 9 - Nova Prospekt                |      1.0      |     CC9    |
      3.10 Chapter 9a - Entanglement               |      1.20     |     C9A    |
      3.11 Chapter 10 - Anticitizen One            |      1.20     |     C10    |
      3.12 Chapter 11 - "Follow Freeman!"          |      1.03     |     C11    |
      3.13 Chapter 12 - Our Benefactors            |      1.16     |     C12    |
      3.14 Chapter 13 - Dark Energy                |      1.0      |     C13    |
    4. Weapons                                     |      1.20     |     DDD    |
    5. Enemies                                     |      1.20     |     EEE    |
      5.1 Combine                                  |      1.0      |     EE1    |
      5.2 Xen Aliens                               |      1.20     |     EE2    |
      5.3 Bugs                                     |      1.0      |     EE3    |
      5.4 Heavy Gear                               |      1.02     |     EE4    |
      5.5 Small Machines                           |      1.08     |     EE5    |
    6. Closing Comments                            |      1.0      |     FFF    |
    7. Version History                             |      1.22     |     GGG    |
    8. Credits                                     |      1.21     |     HHH    |
                              1. What is Half-Life 2?                         AAA
    Half-Life 2 is the sequel to Half-Life. Now who would have thought? Half-Life 
    probably was one of the biggest gaming surprises in 1998 and together with 
    Starcraft it showed what the PC was capable of in terms of gameplay. Other 
    than Starcraft which was also released in 1998, Half-Life took graphics a step 
    ahead, too. Half-Life 2 (being an Ego-Shooter like HL1) also boasted great 
    visuals, has an extremely well crafted sound and tries its best to be an 
    intelligent representative of its genre with lots of dialogues, trigger events 
    and a fantastic physics engine, theoretically allowing for massive 
    possibilities of jerking around or advancing in the game.
    You are Gordon Freeman (again) waking up in City 17 after having accepted to 
    work for the mysterious G-Man. Will our beloved, charismatic, nerdy hero shed 
    light onto some of the mysteries that are still unsolved? I know the answer, 
    but I won't tell you...yet.
                                   2. General Hints                           BBB
    Try not to use the flash light while diving as it also uses the same energy as 
    your air supply.
    Holding down the jump key makes you stay on the surface when swimming.
    Yellow lambda symbols painted onto the wall usually indicate there's something 
    good around, so search for items nearby when seeing one of those.
    Small crates with a yellow sticker saying supply contain just what it says: 
    Supplies, so open them. Also note that these boxes don't always contain the 
    same items. They seem somewhat intelligent, as they hold whatever you are most 
    in need of when opening them.
    Metal crates with an ammo sign on them contain an infinite amount of this ammo 
    type, so open them as often as you want to and maybe use the corresponding 
    ammo for a while, backtracking to the crate to regain your ammo.
    The buggy has an SMG ammo crate at its back.
    Use explosive barrels to your advantage: Shooting them twice sets them on fire 
    so they explode after a few seconds; shooting them thrice blows them up 
    instantly. Oh and please don't ever use your crowbar on them. You can't set 
    them on fire with it.
    When aiming over great distances, zoom in via Z, take aim and zoom out again. 
    This allows for shorter cross hair moves. 
    Don't rely on your squad mates. You might sometimes hide and let them do some 
    of the shooting, but don't use the squad commands or greatly change your style 
    of playing when the allies are around. They don't take a lot of damage and 
    they are far less effective than you should be.
    There is no friendly fire on the rebels' side, except for explosions. Hence 
    you can accidentally hit your allies as often as you wish and run around in 
    front of your buddies even when they are amidst a fire fight. Just don't drop 
    a grenade, or miss-throw an explosive barrel or such.
    It is possible to duck and still fire when manning a stationary machine gun. 
    While this gives you some protection it also probably lowers your precision, 
    so only do it if you desperately need to save every single health point.
                                    3. Walkthrough                            CCC
    This guide was written for the hard difficulty setting. As far as I know the 
    number and position of enemies are the same for every difficulty, so this 
    guide also works perfectly for easy and normal.
    I divided the walkthrough into the chapters given by the game and I further 
    divided those into the various areas that are connected by loading pauses. To 
    allow for an easier navigation of the guide, I also named those areas, trying 
    to omit spoilers given by the titles.
    -=-=-=-=-=-=-=-=-=-=-=-3.1 Chapter 1 - Point Insertion-=-=-=-=-=-=-=-=-=-=CC1
    [City 17 Train Station]
    Be awed by the stunning face textures and animations of the G-Man while you 
    can: You won't be able to come up this close to him in a while. He says 
    something about a mission (remember accepting to work for him at the end of 
    Half-Life 1?) and then you wake up in a train heading for the City 17 station. 
    Valve definitely seems to like the idea of beginning a game in any sort of 
    transport devices. Disembark the train only to be flashed by some sort of 
    sentry drone. It is just scanning you, so don't worry. As you go on, though, 
    you see some masked humanoid creatures, called Combine, working as the local 
    poilce which can already hurt you although you are still amidst the prologue. 
    Simply don't touch them or throw objects at them and you're in no danger. 
    Listen to the old man (Dr. Breen) on the big screen to further realize you are 
    in some sort of totalitarian city, reminiscent of Orwell's 1984. Take a look 
    on the right to see an alien from HL1 cleaning the floor. Finally everybody 
    should have realized there is something strange going on in this world.
    As you move on you can listen to some civilians further deepening the feeling 
    of something bad going on, but luckily Valve gave you the Source Engine, 
    meaning you can throw bottles at people, rip out a phone receiver, get 
    infinite cans out of a vending machine (like in HL1) and so on to distract 
    yourself. After a while you are told to enter a cage and to follow a Combine 
    past an interrogation room (look inside to see some civilian explaining 
    himself and a Combine closing the viewing hatch) into another interrogation 
    room. Oh oh, he wants to take care of you on his own, even turning off the 
    cameras...phew, it's Barney; your old pal from Half-Life 1. After a short 
    conversation with Dr. Kleiner via the terminal the Combine get suspicious and 
    try to enter the room. Hurry, leave the room through the door Barney opens for 
    you...or stay a bit longer, hop onto Barney's head and relax. The Combine 
    won't come in at any time.
    As you enter the dirty storage room you are given your first assignment: Press 
    E to pick up objects (crates in this case) and use this "talent" to build a 
    stack under the window so you can leave the room into a small court.
    [Leaving the Station]
    Enter a new part of the station and watch one of those wicked guards tossing a 
    can onto the ground, telling you to throw it into the trash can. Do so and he 
    will let you pass. Exit the station via the door on the left, allowing you to 
    get a view of City 17 and especially of the citadel in its centre. Take a 
    right, watch another interrogation in a small room and move on to a street 
    barricade. Climb up the ladder in the alley on the right and drop down onto 
    the crate on the other side of the fence. On the left you can see your first 
    strider; War of the Worlds, anyone? Follow the path past two civilians, 
    talking about the Combine investigating lots of buildings, to a play ground. 
    And, oh goodie, it really is a play ground: Pick up the doll making a fun 
    sound, hop onto the swings, drop a concrete block on the teeter totter and so 
    on. Can't just everybody play like that? The rotten HL2 world would be a 
    better place for everybody. Anyway, enter the building on your left once 
    you've had enough.
    There's only one possible way: Into the hallway with a few Combines standing 
    up ahead. Get into the kitchen, talk to some people and again enjoy the Source 
    Engine as you pull the TV out of the wall and throw it through the window 
    (eventually hitting a Combine down below). Proceed to the end of the corridor 
    and listen to the announcement: They have detected there's a person in your 
    sector that doesn't belong there...you! Run up a storey (any other paths are 
    blocked either by locks or by Combines) and into a room a guy waves you into. 
    Don't waste too much time now, as the enemies beat their way through your 
    newly found allies, but you're not in a big hurry. At the other end of the 
    hallway you'll have to walk up another set of stairs to yet another room 
    guarded by a civilian. He tells you to move on quickly, but actually you can 
    stay in that room and go to the bathroom or such, given he manages to hold 
    back the Combines as long as you wish to stay.
    Up to the loft and quickly out of the broken window onto the roofs. By now the 
    Combines should have come close by, starting fire from behind. Stick to the 
    right wall and carefully walk along the ledge not falling down into the abyss. 
    Eventually you reach a window to climb in, bringing you into another loft. Go 
    down the ramp, take a right and don't panic as a Combine busts open the door. 
    Simply turn around, go to the other door and...see that one also get smashed 
    open. There's only the way back up the ramp left, so take it; or at least try 
    to. It breaks as you hop onto it so be a man about it and stay where you are 
    so the Combine can beat the crap out of you. After going down, Alyx arrives to 
    the rescue. Follow her into the lift. Listen to the one-sided conversation and 
    finish the first chapter.
    -=-=-=-=-=-=-=-=-=-=-=-3.2 Chapter 2 - A Red Letter Day-=-=-=-=-=-=-=-=-=-CC2
    [Face Humper]
    Follow Alyx to the first yellow lambda symbol in the game. Every time you see 
    one of these you know there's something good around. In this case Ms. Vance 
    opens a secret path to Dr. Kleiner's lab. Listen to the dialogue between the 
    two characters and also Barney joining it after a while, and distract yourself 
    a bit by teleporting a cactus, looking through the cool lens, touching the 
    little hula-girl-figurine, discovering an old photo of Dr. Klein on the pin 
    wall, having a look at an old picture from Black Mesa or maybe just hopping 
    onto any character's head and staying there for a while. ^^
    Eventually Barney walks into a small storage room, finding Lamarr who turns 
    out to be a debeaked and sexually active Face Hugger. Put on your Hazard Suit 
    and tank some suit energy at the Combine power station in the corner of the 
    main lab room.
    Then enter the teleporter room and get your first look at Alyx' father (Eli 
    Vance) on the screen. As Alyx is about to be teleported something seems to go 
    awfully wrong...great machinery: It's only the plug that has fallen off. Put 
    it back into the wall and activate the switch to both finally transmit Alyx 
    and to get some exaggerating praise from Dr. Kleiner. At least Barney shares 
    your thoughts and cracks a nice joke about it. ^^ Now it's time to be 
    teleported yourself. Step into the transmitter and watch yourself being 
    transported to various places thanks to Lamarr. Oh goodie, Dr. Breen now knows 
    you are in City 17. Oh well, at least you don't get eaten by that ugly fish 
    and after finally ending your travel outside the lab near some Combine 
    scanners you are in a better condition than President Scroob was in Spaceballs 
    after being teleported.
    Anyway, you are told to hurry, yet again there's no need to. Drop down and 
    search for a door behind another fence, leading you to a passage that's 
    blocked by some wooden bars. Hmm, how to get through? Barney joins you above 
    giving you the original, famous crowbar from Half-Life 1. Slash your way 
    through the wooden planks and a crate to reach the first (unarmed) enemy to 
    beat: A Combine Sentry Drone. Drop down and quickly take a left into the 
    train, as some Combines open fire from up above on the right. Hack your way 
    through the wagon, leave it and hide behind the train on your left since 
    another train is coming in, which might roll over you. Get rid of another 
    sentry drone and follow the incoming train. Zip in between two trains on your 
    left without stopping and enter another wagon nearby. Climb up the ladder, 
    turn left and jump onto the wagon ahead and over the fence while being 
    attacked from behind. Swiftly move on, crack the lowest wooden bar at the 
    opening and go down the ramp.
    -=-=-=-=-=-=-=-=-=-=-=-=-3.3 Chapter 3 - Route Kanal-=-=-=-=-=-=-=-=-=-=-=CC3
    [Battle on Rails]
    Refresh at the health station on the left wall. Hear that cry for help? We 
    can't ignore that, now can we? Haste around the corner and smack the pistol 
    wielding Combine with your crowbar. You should be able to catch him off guard, 
    allowing for a few blows before he and his companion start attacking you. Once 
    the first one is down, go for the Combine with the tazer stick. Go back to the 
    health panel if you haven't depleted it before this struggle. Then move on, go 
    up the ramp to the locked door and stay there, waiting for another Combine to 
    walk down the stairs. Aim for his head. Move on until you see daylight coming 
    down. Around the corner is another Combine whom you should give a head shot.
    Step out of the dark, walk down the metal stairs outside to trigger a train 
    coming to a halt right where you need it. Go back up and use the train to 
    reach the other side of the trench. Turn around and blow up one of the 
    explosive barrels to buy yourself some more time when breaking the upper 
    wooden plank in the entrance to the house. Enter it and break apart another 
    Sentry Drone while watching out not to come too close to the windows, as 
    infinite Combines aim at you from the other side of the trench. See the yellow 
    lambda symbol on the left wall? And do you remember what I said about it? 
    Approach it to find some ammo and health. Move over to the other room and 
    simply hop onto the explosive barrels and crawl out of the house instead of 
    wasting a bullet on the barrels.
    Stay left of the exit and aim for a barrel on a ledge up ahead. Its explosion 
    takes care of some Combines nearby. Next, look at the small crate with the 
    yellow sticker on it. Yellow? Seems like some Ivan Pavlov-experiment to me, as 
    yellow once again means goodies, so keep in mind to watch for those small 
    crates throughout the game. Move on and climb over the deformed fence which 
    gets you back into the line of sight with the endlessly respawning Combines on 
    the other side of the trench. Speed to the containers on the right and crawl 
    through the vent (picking up some more items) still not getting you away from 
    those guys.
    Continue to the right and drop down onto the pallet to avoid falling damage. 
    Shoot the barrels and watch out for some more barrels rolling down the stairs 
    around the corner. Hitting them, too, should take care of any Combines around, 
    giving you the time to pick up some suit energy under the stairs. Watch out 
    for the incoming train, go up and kill two more Combines before it's time for 
    some serious fun: Pick up one of those explosive barrels (I hope you left at 
    least one) and move on. Two enemies will hop down to the rails behind the 
    force field. As they do, they are unable to attack, allowing you to somewhat 
    safely toss the barrel near them and shoot it.
    Do you still have one of those red barrels intact? Great if you do, since you 
    can pick it up and drop it near the other force field now. Then go up the 
    stairs and step onto the metal bridge to trigger lots of Combine Soldiers 
    closing in from where you placed the explosive gift. Shoot it from here when 
    they are close to it (if you aren't that confident in your aiming skill, place 
    the barrel at the force field you are about to get past and shoot it after 
    going down). Break the crates ahead and go down to see some additional 
    Combines. If you want to you might get back up and to the medical energy 
    station to clear the whole area once and for all. The loads of ammo and the 
    medical panel should outweigh any risks here. Otherwise you can drop down 
    behind the force field and kill your enemies from here, but in this case much 
    of the ammo that's being dropped probably stays out of your reach as you 
    cannot get back to the other side of the force field. Now relax and restore 
    yourself at the new medical station and the small crates.
    An alternative way of dealing with these hordes of Combine is to speed over 
    the metal bridge, run down and keep running to the left, avoiding any direct 
    battle with the humanoids, but if you choose this alternative you have a 
    rather hard time nabbing the suit armor inside the crates.
    Jump into the water and enjoy the reflections on its surface until you reach a 
    red container. Climb up the ladder on its left to get in and meet part of the 
    resistance...and a nice vortigaunt alien, powering a TV with its electrical 
    power. ^^ Get some of its power to strengthen your suit and break some 
    obstacles outside to enter the next area.
    [The Railway]
    Crawl through the rubble, watch a Barnacle eating a raven and witness an 
    execution. There's still a survivor in the canal on your right so haste to him 
    before it's too...ok, it's too late, no matter what you do. Position yourself 
    on the rubble and take down the executioner on the far left as well as another 
    one coming around the right corner. Get around the corner yourself and run for 
    the stack of crates. Crouch after a few steps to hide from the machine gun and 
    quickly enter the canal on your right. Kill a lone Combine in Underground 
    Station 12 to gain access to lots of suit energy and the com showing how 
    drastically the rebels are being attacked. Climb up the ladder, shoot the 
    explosive barrel and take care of any survivors before taking control of the 
    machine gun yourself.
    There will be few waves of Combine and Sentry Drones coming from two points on 
    the lower level and from two on the upper level, but as long as your aiming is 
    somewhat good and as long as you concentrate on the Combine you shouldn't be 
    in for a lot of trouble. Once the normal enemies are defeated, a police car 
    opens fire with heat-seeking missiles, so quickly leave the machine gun and 
    keep moving to not get hit. In case you need it, there is a health pak near 
    the stack of crates you used to hide behind a few moments ago. Shoot the 
    barrel on the levelled ledge to your right to lower the platform.
    Follow the ledge to a lambda symbol. There's some health behind the red car 
    wreck. Avoid the Barnacles, but shoot the last one before reaching the 
    daylight again, as it blocks the path out. Listen to the only survivor of the 
    nearby rebel station and enter another canal.
    Are you in for some killing? If the answer's yes, then look up and try to hit 
    the two Combine guards as often as possible before they run off to the right. 
    Follow them underground into a water basin and watch out for the burning 
    explosive barrels they drop down once you go for a swim. Either stay at the 
    surface a bit prior to diving out of the way of the explosions or climb out of 
    the water to avoid the explosion. Then look up again and finally dispose of 
    the two bad guys.
    If you don't want to kill them and just want to get along peacefully, ignore 
    them completely and speed through the canal.
    Leave the canal, shooting a few more enemies either by hitting explosive 
    barrels or by attacking them while they jump down. Crouch behind the van to 
    see some more barrels at a bridge. Shooting these prevents some Combine to 
    appear after a few more moments. Move on and quickly dispose of two Combine 
    dropping down on the left and on the right. Use the crowbar to push a harmless 
    barrel into the tentacles of the Barnacles up ahead and quickly pass by when 
    they pull it up, expecting some prey. Then grab one of the explosive barrels 
    and feed it to the mass of Barnacles that comes next. Stay near the other 
    barrel and shoot the thrown barrel twice when it is pulled up, so it starts 
    burning and explodes right at the aliens. Afterwards repeat for the other 
    barrel and move on.
    Don't get out of the canal just yet. Instead watch the explosive "treat" 
    falling down into the water ahead. This is a warning, so be on your guard. 
    Jump into the water, hiding behind the wooden wall to dodge another barrel. 
    Then peek around the corner where an explosive barrel near some Combine 
    couldn't possibly be placed any better. It creates a big chain reaction, 
    leaving behind only one Combine at maximum. Climb up the ladder ahead and swim 
    on, ignoring a barrel being dropped behind you on your way. Walk up the ramp 
    and hide behind the wooden poles to have a better position against the two 
    Combines entering the action on the bridge. Hop from platform to platform, 
    only retreating once to dodge a barrel, to reach just another canal, yay...
    [First Act for the Helicopter]
    Put some concrete blocks onto the left side of the seesaw to enable yourself 
    to use it as a path up to the exit. Yikes, a helicopter! You'll deal with it 
    for quite a long time and it won't be a pleasant time. Slide down and hide 
    behind a wooden board on the right until the copter's first burst is over. 
    Then to the closed canal entrance in front of you and as the third hideout to 
    the Barnacle on your left. Afterwards open the door nearby and enter the 
    building. See that lambda below? Climb down a ladder to some goodies before 
    moving on. Crawl through the shallow water, shoot the explosive barrel in the 
    place with the low ceiling and pick up some stuff. Now pick up another 
    explosive barrel to feed it to a few Barnacles. Its remaining pieces should 
    distract the Barnacles further down the ramp, but if you're too slow, just 
    grab a normal barrel as a distraction. Slide down and repeat the whole 
    procedure against two more packs of Barnacles. Leave the building and quickly 
    sprint around the left corner, because the copter opens fire again, without 
    leaving you any good place to hide.
    You'll reach another small outpost of the rebels, only held up by a single 
    man. After a short conversation some manhacks break through the door. Either 
    use the crowbar to quickly destroy them and rescue your ally or (as he 
    actually serves no purpose to you) stick with the pistol and move backwards 
    through the corridors while fighting the manhacks. This takes longer and it 
    uses ammo, but it saves health. Afterwards climb up the ladder to find some 
    goodies. Move on and attack three manhacks through a girder door. Eventually 
    they will find their way to you above the door, but then they should already 
    be damaged quite well. Hit an explosive barrel around the next corner twice to 
    aid you against some more of those pesky machinery things.
    When you see the daylight, don't exit already, but go on to find a few 
    goodies. Only then step out and kill two Combines up above. Hear those 
    manhacks coming? The best thing to do now is to retreat into the corridor and 
    to close the door. There are five manhacks around, but they can't reach you 
    now. Take your time and shoot them through the door. Then go out again and 
    enter the next corridor. Ignore the barrel for now and crawl through the vent 
    on your left. You have to face a manhack in here, but the loads of supply 
    crates at the end of the vent are well worth it. Go back and blow up the 
    barrel as a Combine has positioned himself next to it.
    Drop down and move on until some Combines rope down. Give the one nearby a 
    headshot and retreat behind the small stone edge. Wait for the other two guys 
    to come by the explosive barrel to have an easy time against them. Pick up the 
    SMG they dropped and place the other red barrel where the first one was lying. 
    There's a narrow passage behind the barrel: Crawl through, pick up goodies and 
    kill your first zombie. Then crawl back out to see another Combine being 
    triggered to rope down. Luckily you have placed a barrel right next to him. 
    You know what to do.
    Time for a dive: Search for the underwater passage in which you have to 
    surface once to refill your energy. Then follow the pipe to two Combines 
    roping down again and to a Sentry Drone. The easy way now is to walk up the 
    stairs (watch out for the Barnacle) and to hop onto the pipe from there. This 
    path might be easier, but it also makes you pass up on some good stuff. If you 
    want that, step outside and face two Combines and two manhacks prior to 
    jumping onto the pipe. No matter which path you choose, you have to walk along 
    the pipe, wait for the steam to pause, destroy a manhack in a narrow spot and 
    dodge some Barnacles. The best way to get through here is to quickly grab the 
    barrel around the right corner, let it be pulled up by the first Barnacle and 
    to hit it twice on its way up.
    Break the boards near the lambda sign to reach another place in the outside. 
    Equip the pistol to quickly get rid of the guard at the truck up ahead. As you 
    do, the truck unloads some explosive barrels which you should blow up in 
    midair. This takes care of another Combine nearby. Equip the SMG and go around 
    the corner to trigger three Combines. Retreat and try to deal with them one by 
    one. The dark corridor you have to follow now, contains two niches with items, 
    but also triggering two manhacks. The items are worth it, though. Afterwards 
    go to the end of the corridor and retreat backwards. A bunch of manhacks will 
    follow you, allowing for a great use of your grenade. Use the SMG to deal with 
    the rest while still walking backwards.
    The next room has some nice goodies, but you will need them. Crawl through the 
    vent and after a bout 3 to 5 seconds you better start a big chain reaction 
    with those explosive barrels to clear the room of loads of manhacks. Destroy 
    any remaining with your crowbar. Climb up the ladder, jump onto the pipe, go 
    left and drop down to a passage leading to a room with another big pool of 
    water. Don't open the supply crate yet, if you can take a bit of frustration 
    and if you want some suit energy. I'll tell you what I mean in a few 
    sentences. Drop down from pipe to pipe to find a valve pumping more water into 
    the two rooms. Now pick up the crate and carry it over to the first room where 
    four manhacks have spawned in the meanwhile (is "spawn" actually the correct 
    term for manhacks after all?). Lay down the crate while fighting them. Then 
    pick it up again, jump into the water, climb up the ladder while only seeing 
    it at the left end of your screen (or else you cannot carry the crate while 
    moving up), hop onto the pipe and place the crate at the bend on your left so 
    you can use it to reach the bar directly in front of you and the vent behind 
    it. There is only one single suit energy item in the vent, so decide for 
    yourself whether this is worth all the hassle (and don't forget to bust open 
    the supply crate).
    No matter how you decide, you have to swim down into a tunnel and break some 
    boards underwater in the other room. This makes some objects float at the 
    surface so you can use them to get up onto the ledge leading to the next area.
    [Radioactive Man]
    Get up the ladder, dispose of a Sentry Drone and mentally prepare yourself for 
    a rather difficult fight. Jump down behind the fence, turn right and run in on 
    a manhack while shooting your SMG at it. Continue to a dead end, turn around 
    and destroy another manhack. Shortly after two Combines rush in, so I hope you 
    have taken care of both manhacks before. Use the SMG on these four enemies. Go 
    on, jump up via the barrel and let three manhacks taste your crowbar before 
    nabbing some items. Up ahead are even more goodies you can earn by distracting 
    a Barnacle with a barrel. Climb up another ladder and feast on the two lambda 
    symbol spots before dropping down on the other side of the wall (watch out, 
    though: I once got stuck and squished in midair when dropping down here).
    Return to the daylight. This time around it is gonna last for a while. Stay 
    away from the radioactive waste and traverse it on the pipes for some items. 
    Then move on at the lower level and assist a rebel against two headcrabs. The 
    crate on your right holds an infinite amount of SMG ammo. The next section is 
    best dealt with by advancing slowly, watching for all those headcrabs to 
    unbury themselves. There are also a few zombies mixed in, but as you can 
    always go back to pick up SMG ammo you can shoot around as wildly as you like 
    to. Close to the end of this place (which seems to have been a living place 
    for some rebels) you come across an electrified cable (wait for it to swing 
    right before running past it on the left) and an electrified container which 
    seems to be more of a problem than it really is. Only the container walls can 
    hurt; standing inside of it doesn't do anything. So go through it and stay in 
    it when a headcrab missile crashes down. The headcrabs will jump against the 
    container, dying instantly. Hehe.
    After a short walk you arrive at a hovercraft garage of the rebels. Board your 
    new vehicle and ride along the radioactive river up to a shut gate on your 
    left. Get out of the hovercraft near the headcrab missile ahead and kill one 
    of those aliens behind the stack of boxes. Then open the gate and drive 
    through to the next chapter. Look closely to see a supply crate in the liquid, 
    which you should break open by driving over it.
    -=-=-=-=-=-=-=-=-=-=-=-=-3.4 Chapter 4 - Water Hazard-=-=-=-=-=-=-=-=-=-=-CC4
    [Station 12]
    Disembark and climb up the ladder at the lambda symbol for some pistol ammo. 
    After a short bumpy ride you will see a big red house. Remember how you were 
    told to get there to seek help at station 12? Get off the hovercraft, enter 
    the house and...face two zombies. The Combine were faster than you. Use the 
    crowbar against these two foes as well as against a face hugger on the planks 
    below the ceiling. Climb up to the room that controls the block and pulley. 
    Hitting the barrel with the crowbar lets the cage fall down into the water, 
    releasing some goodies.
    Ride over the ramp and come to a halt at the bridge on the right. A fellow 
    rebel drops some supplies before running away from a Sentry Drone. After 
    picking them up, grab the blue drum, take a dive and set the barrel beneath 
    the open cage. Leave the basin and go through the passage at the yellow lambda 
    symbol to find two more of those blue, light barrels. Place at least one of 
    them in the cage as well to build a ramp you can jump over with the 
    New enemy crafts: These things that look like some sort of an alien-
    helicopter-hybrid serve only as troop transporters at the moment, but later in 
    the game they will be way more annoying. Either stop on one of the small 
    islands and kill the three Combine from there, or simply drive over them, 
    taking a bit damage while approaching them. Afterwards place a barrel under 
    the opening with the lambda symbol next to it and swim through to reach a 
    zombie and some items. Move on with the hovercraft, crashing into three 
    Combines on the way and speeding over another ramp. Upon your landing you 
    drive through some thin wooden poles that hold a platform. See hoe the Source 
    Engine nicely crashes the whole construction? Don't you, too, think this is a 
    great sight? Perfect: Quickly race on and repeat this crash on the right side 
    to surprise two Combine soldiers. The Barnacles under the bridge shouldn't be 
    a problem to you.
    [A Hero...wow]
    Give another Combine an involuntary swim. The water way is blocked by a gate, 
    so disembark to search for a switch or something else. Climb up the ladder, 
    listen to Dr. Breen (yeah, we're a hero!) and pick up the items in the two 
    small rooms before peeking around the corner and shooting the explosive barrel 
    on the left and some Combines. See the grenade crate? This means you can and 
    should use grenades over the course of the next rooms. Toss some through the 
    windows near the manhacks, so only a few of them can get out of there and 
    attack you. Open the door and haste behind the wagon to your left, as a 
    Combine stands at a machine gun up ahead. Push the wagon forward while 
    crouching to eventually get close enough to the enemy to throw grenades at 
    him. Restock on grenades; you'll need them in the next room. After opening the 
    door, throw in two grenades and repeat. While this might not take care of all 
    Combines in there, it eases the situation a lot. Now storm in and finally 
    clear the area. Climbing over the blue tanks on your right earns you an SMG 
    Outside you find the gate opening mechanism. Ok, it's broken, but at least 
    you've found it. Don't worry, though. Shoot the barrels behind the fence to 
    break open the gate. Then get back to the machine gun and use it to get rid 
    for four Combines. Back in the Combine garage you will have to face some more 
    Combines, but the infinite amount of grenades ought to make this battle rather 
    easy. Just watch out for the newly installed machine gun behind the liquid 
    Return to the hovercraft and get going. The oncoming passage is crammed with 
    Combines, Barnacles and even missile-shooting police cars, but there isn't 
    anything good to nab. Ergo: Keep driving at high speed and move a bit to the 
    sides to dodge the missiles. After a right bend you will see a barricade 
    that's even being lit up. Stick to the right wall to get over a ramp. After 
    that stick to the left wall to be somewhat hid from the Combine cars.
    Stop at the lambda symbol, taking the concrete blocks out of the basket. This 
    lowers the other basket, which contains some items. Hop into the hovercraft 
    again and ride out into the open, where the gate is shut down and you are 
    being shot at. Ignore the Combine; drive to the door on the right, pick up the 
    Magnum inside and aim it at the door behind the table. Three Combines open it, 
    but your new weapon quickly takes 'em out.
    Prepare for what is the most difficult area so far: Remember how I said the 
    copter would bother you for a long time? Now he really is after you. Go up the 
    stairs and keep on running as you shoot a Combine. Also kill the next Combine 
    at full speed and then hide in the container from the copter fire. Here you 
    should also take care of the manhack. When the copter fire ceases, run out of 
    the container and move on. Hit the third Combine and hide inside the big 
    container where you can also take the time to pick up some supplies. Leave the 
    container on its other end to face two Combines, guarding a supply crate. 
    During the whole course of running around in this area you should keep an eye 
    on the position of the copter and on when it is about to fire, so you can 
    crouch behind any objects to hide.
    Now haste into a storage hall past some manhacks. Fire your SMG grenade at the 
    two Combines up on the left and equip the crowbar when standing just beneath 
    them. Destroy the manhacks, before the other Combines in this hall close in on 
    you. Shooting them down probably is the easiest part of this area. Then search 
    inside the containers and the rest of the hall for lots of items and advance 
    by walking up the stairs and hopping onto the containers. As soon as you see 
    that you've triggered three Combines up ahead, drop down and hide from them, 
    allowing you to eliminate two other guards entering the hall from the big gate 
    you came through. Then aim up and finally clear the area.
    Behind the place where the three Combines came from, you have to duck under 
    some windows to get past the copter slowly, but safely. Break the crates with 
    the crowbar and throw a grenade against the wall in the next room in such a 
    way that it bounces off to the right, killing an enemy. If you attack him the 
    direct way, two more Combines would rush up the stairs, causing quite some 
    trouble in this tight place and with your health probably being a bit low by 
    now. But since you (hopefully) used the grenade to get him, his buddies won't 
    notice you, allowing for you to slowly move down (after picking up some 
    health) and carefully aim for their head from behind. Relax at the health and 
    suit energy panels, as your way gets you back into the copter's sight.
    Run out and around the right corner to find a grenade in a supply crate. Then 
    carefully observe the copter to hide successfully on your way to the upper 
    right end of the court where a single Combine awaits you. From here on there 
    isn't much to take cover so simply zip over to the guard tower, killing a 
    Combine behind the fence and two more up inside the tower. Duck behind the 
    windows so the copter can't hit you and in between the bursts you have to get 
    up and counterattack with the machine guns around until your flying nemesis 
    parts off. Hit the switch to open the gate and return to the hovercraft by 
    jumping over the railing.
    Speed through the gate only to be facing another copter. This one doesn't only 
    have a machine gun, but also proximity mines. Stick on the right wall as you 
    haste through this canal. Race up the ramp and move right on it to proceed. 
    Directly after that the copter employs his machine gun, so head for the 
    passage on the right in which you are safe from that attack.
    [A Bumpy Ride]
    Take a left, speeding directly to the copter. It drops quite a lot of miens 
    now, so you might want to stay right of the enemy. After a while you will see 
    a broken ship on the right and a pile of dead trees on your left. Ride over 
    the trees to cut the track short. A bit later you see some concrete tunnel 
    pieces up ahead. Before heading there, take a left and drive over the supply 
    crate. It's worth it. Then go through the tunnel pieces and try your best to 
    stay in the centre of the track so you jump onto some more of those pieces, 
    leading into a real tunnel.
    [Even Bumpier]
    Break open the two supply crates ahead and move on up to two dead trees lying 
    there as a ramp. Naturally, you have to ride it up, but as you do, try your 
    best to fly off to the left at its end. If you manage to land on the left 
    ledge you automatically dodge most of the mines and you get to feast on 
    another supply crate. Take a right and fully concentrate on going fast and on 
    dodging the mines; there's only one supply crate on the way and you pick up 
    the goodies inside almost automatically as the passage is narrow and gets even 
    narrower due to a mine dropped right next to the crate. Stay left under the 
    first bridge to avoid some Barnacles, then go right and stay on the right 
    under the second bridge. Keep your balance on the way up to the ramp so you 
    fly over to the red storage building.
    Ride into it and park on the metal platform to your right. Get out of the 
    hovercraft to break open some supply crate and to use the stations on the 
    wall, while always listening for the sound the copter makes just before using 
    the machine gun. Also activate the valve to lower the platform (you might have 
    to park the vehicle a few times before it finally moves down with the 
    platform, due to some strange clipping). Hop down and get back into the 
    hovercraft. Behind you is a supply crate with some health in it, but you 
    should already be at good health, so ignore it. It was probably only placed 
    there for if you miss the jump over to the red building. Instead, move on. 
    Keeping a good speed and staying left will get you past the collapsing factory 
    chimney without having to search for a way to get over it. Then stay right to 
    avoid the first few mines. Dodging the other mines and the missiles shouldn't 
    be too much of a problem now. Speed into the tunnel in front of you.
    Get off the hovercraft, nab some health in a crate on the right and then some 
    more in the dark area, guarded by a zombie. Climb up the ladder, hop over to 
    the washing machine, which you need to push down into the cage where the 
    supply crate lied. This raises a ramp you can ride over. Move on to another 
    rebel outpost where you get a copter gun attached to the hovercraft after a 
    short conversation.
    Move out and test your new gun on some Barnacles and even already on a copter. 
    Fortunately your gun makes the copter flee in no time. Then shoot some 
    explosive barrels and a watch tower on the right for some health. Continue to 
    two open gates right after one another. They close as you are in between, but 
    don't worry: Just position yourself at the second gate, turn around and hit 
    the explosive barrel to take out three of four Combines. Shoot the other one 
    before turning left where three more enemies will rush out of a door. While it 
    is possible to get up to where the four enemies came from, it is completely 
    unnecessary as there is nothing to pick up. Instead, ride up the broken fence 
    and disembark. There are quite some goodies in the room where the three 
    Combine came out.
    Get back into the hovercraft and speed through the fence ahead right into the 
    metaphorical arms of a police van. Don't slow down; ride around the bend as 
    quickly as possible and shoot the heat-seeking missiles to take them out. Now 
    ride up the ramp to pick up some health and to make the instable tower 
    construction collapse. Around the next bend you will face some more Combines, 
    but they are no match for your new gun. Hit the explosive barrels and after 
    that some Combines in the tunnel. Again, it is possible to get up to the 
    ledges, but the scarce items around here aren't worth the risk.
    [Close to the real Payback]
    Do yourself a favour and ignore the Combine on the far left, even though there 
    is a tempting red barrel next to him. Instead, swiftly advance, only 
    concentrating on the missiles you should blow up in midair. Shoot the Combine 
    transporter in the next passage. Now relax a bit, train your aiming on some 
    Barnacles and...wait a second! It's him! Up on the left you can see the G Man 
    for a brief moment.
    Get off near a Combine and walk around the passage until you see a zombie 
    standing up. Equip the pistol, retreat a few feet and kill five headcrabs and, 
    of course, the zombie, prior to climbing up the ladder to a sleeping place 
    that holds some items. Alternatively you can try and use a single grenade to 
    wipe out all enemies at once.
    Get back into the hovercraft and ride up the pile of dirt to reach a ramp. 
    After traversing the tunnel, shoot some more Combines and drive to what seems 
    to be a dead end. Look up as you, since a Combine and an infinite amount of 
    explosive barrels will be triggered. The barrels can actually be pretty much 
    ignored as there isn't anything around that could blow them up. After a few 
    more Combines and a tunnel you see two red containers ahead. Inside one of 
    them you can nab some items.
    Then ride into the big open space and keep moving around while shooting two 
    police vans. Definitely concentrate on one of them until it blows up, before 
    attacking the other one. Also don't bother hitting the missiles: It is nearly 
    impossible to hit every missile of both cars and in addition you better 
    destroy the vehicles as quickly as possible. Mikoro sent in a neat trick for 
    those two armoured cars. After leaving the tunnel and getting up to the 
    containers in the corner, start hugging the wall and slowly advance until you 
    can see the car that is further ahead. Shoot at it from a distance so it will 
    not retaliate. Once you are done with that one, slowly move on until you can 
    see a bit of the other car just behind the ship wreck and detroy it as well 
    without getting hurt yourself. Once the area is secure, break two crates in 
    the water between the cars and move on to the highly dented orange container 
    on the left for another crate. Disembark to get through a tight hole in the 
    fence near the other container. Blow up the barrels inside the container to 
    allow for the hovercraft to get through. Jump over the ramp.
    [Duel at Noon]
    A large open area and not a single threat around. Come on, we all know that 
    there has to be something big coming and yes: There is. You finally get to 
    destroy one of those helicopters. Give it all you've got, only stopping when 
    the copter fires back at you. Hide behind some rocks for a few seconds when 
    that happens. After a while the enemy starts dropping mines as well, but if 
    you look at the path the copter takes while dropping them, you can easily tell 
    where it will fly to over the next few seconds, as it drops his explosive 
    treats only in a straight line. Then a bit later again, the copter totally 
    freaks out, dropping hundreds of mines. Still look at where he flies and 
    calculate where he is going to fly to and simply move a few feet away from 
    that line. The other mines will fall down far away from that line, so you're 
    in nearly no danger.
    Afterwards look around for some supply crates, prior to closing in on the shut 
    gate. Climb up the ladder to find the valve that opens it. If you're in for a 
    little treat, then head straight through the gate with the hovercraft until 
    you reach two pipes with bars on them. Park the hovercraft right in front of 
    the left one, so you can use it to get up and through the open lattice. 
    Quickly jump through the toxic waste until you reach a cave on the left where 
    you'll find a singing Vortigaunt doing some BBQ and hiding some supplies. 
    Thanks to Warlock1307 for this easteregg. Next, ride up the ramp behind 
    putside with your hovercraft to ease the battle against some Combines in front 
    of the big building. Go in to find a lightly guarded Combine station, crammed 
    with everything you need.
    Leave the building and get to its back where you will not only see the G Man 
    again, but also a lever which opens the flood gate. Board the hovercraft and 
    use the rubble in the water to jump through the gate into the next chapter.
    -=-=-=-=-=-=-=-=-=-=-=-3.5 Chapter 5 - Black Mesa East-=-=-=-=-=-=-=-=-=-=CC5
    Leave the hovercraft behind at the dock and search for the entrance to the 
    rebel headquarters. Judith Mossman takes you straight to Alyx and Dr. Vance. 
    Listen to the dialogues; unfortunately there isn't much around here to keep 
    you entertained. At least get a look at the family photo of the Vances before 
    Alyx takes you over to the scrapyard where you will get to practice with the 
    gravity gun. Taking a right in the tunnel makes her give you some additional 
    info on Ravenholm...a place they don't go to anymore...
    You are given the gravity gun...or the zero-point energy gun, if you prefer. 
    First use it to push some things, then to pick up stuff, then to pull the 
    barrels high up towards you and finally to stack some objects, allowing you to 
    get up to Alyx. The easiest way to do this is to put the small box on the 
    right onto the bigger box.
    Follow Alyx to meet D0g, her robotic pet. Keep the secondary fire button 
    pressed as you play fetch with him, so you don't risk getting hit by the 
    crates or later by his ball. When you have had enough of plying around, go to 
    Alyx to trigger an assault by the Combine, but make sure to grab D0g's ball 
    either in your hands or with the gravity gun as it will come in handy in the 
    next chapter (thanks to tdaranouvong for this).
    Alyx takes you back into the tunnel system where you get separated, being told 
    to go to Ravenholm (I thought we don't go to Ravenholm? So why is D0g supposed 
    to follow Alyx and you aren't? Can't D0g just clear the path from the rubble? 
    Oh well.). Push some obstacles out of the way and break the lock on the ladder 
    using the gravity gun to reach Ravenholm. In case you still want to hold on to 
    the ball, I suggest climbing the ladder facing in the opposite direction while 
    holding the ball in your hands.
    -=-=-=-=-=-=-=-=3.6 Chapter 6 - "We don't go to Ravenholm..."=-=-=-=-=-=-=CC6
    [Physics can be fun]
    Welcome to Ravenholm, a forsaken place infested by headcrabs and their 
    buddies. If you brought along D0g's ball it will follow you like a pet and 
    attract enemies so they attack your companion instead of you. You only need to 
    watch out for ledges, stairs and the likes, as the ball cannot roll up, so you 
    will have to pick it up and carry it up. Anyway, go straight to the hung lower 
    body part to find a lone zombie. After killing him with the crowbar, it's time 
    to enjoy the gravity gun. Enter the hut to your left, containing lots of gas 
    tanks and metal blades. Use mostly the latter ones to fire your way through 
    some zombies until you hear a human voice. You will meet this guy later on, 
    but for now he's rather unimportant.
    Approach the spinning thing ahead. This triggers two zombies to walk right 
    into it, being torn apart by it. If the trap makes you feel uncomfortable 
    (e.g. in case you might consider retreating after a fight) you can crawl to it 
    and turn it off. Otherwise carry a metal blade with you, crawl past the trap 
    and activate another trap in the next room, while crouching. There's only one 
    headcrab directly in this room, but in the left corner is an opening with some 
    more zombies. Just lure them into the trap and you should be doing fine. The 
    table holds a new metal blade and some health. As you move on you will face a 
    few more headcrabs and zombies which should taste your metal blade as well or 
    maybe an explosive barrel, but the spin trap in the next room is quite useless 
    as activating it would require you to run right into an enemy-infested area.
    Toss anything at the zombie sitting outside to clear the way to see Grigori 
    for the first time. Approach the fire to trigger him appearing as well as some 
    zombies of which your new ally takes care of. Kill a lone zombie to the left 
    of the bonfire and turn the valve that controls the gas, thus extinguishing 
    the fire. To proceed you have to enter the building in which Grigori was, but 
    first of all you better enter another hut nearby, guarded by two zombies. 
    Inside you will find some gas tanks, metal blades and health paks. Turn on the 
    gas and press the red switch for some fun. Grab one of those gas tanks, 
    extinguish another fire via a gas valve and use your explosive treat on some 
    zombies around the corner.
    As the fence is electrically loaded, you cannot move on here, yet, so return 
    to the first fire and enter the building. Shooting the explosive barrel on the 
    upper level should take care of most enemies here and the crowbar does the 
    rest. Climb up onto the left energy generator to reach a vent shaft leading to 
    some goodies. Get back in and walk up the stairs. Ignore the first explosive 
    barrel, but blow up the second one and deal with any survivors at the end of 
    the staircase. Traverse a few more rooms to finally find the lever that turns 
    off the electricity at the fence. Watch out for two new enemies, though: 
    Poisonous headcrabs. If you are confident about your aiming skills you can use 
    the gravity gun on them, otherwise employ the pistol.
    As you leave the building you have to face three more of those. Then climb up 
    the ladder over the fence and eventually get up onto the roofs where you get 
    even closer to Grigori than before. Drop down onto the planks and into the 
    room at their end. The gas tanks here actually aren't a big help, as tossing 
    them around with the gravity gun is too dangerous and lighting them up after 
    dropping them down probably misses all enemies. Just use the gravity gun 
    against the headcrabs while standing in the upper room and the crowbar against 
    the zombie after dropping down. Leave the building. Yay, a new trap: Your 
    priest friend has attached some cars (!) to block and pulleys. Attract the 
    enemies to go under the cars and activate the switches to smash them. Some 
    will probably get past the cars, requiring you to either use the crowbar or 
    the pistol.
    Once the area is clear, make the first car go down, jump onto it and go over 
    the planks to get into a good position for a jump over to the yellow lambda 
    symbol. To get back out of this hidden place you have to climb over the girder 
    at the right wall. Use the second car to enter another building and to reach 
    the next loading sequence.
    [A Heavily Infested Court]
    Behind the door you'll both find some very tempting barrels and a poisonous 
    headcrab. Still, don't blow up the barrels, but use the gravity gun against 
    this foe. Waiting for the explosion takes too long here. Enter the next room, 
    shoot a zombie and watch Father Grigory take out lots of zombies outside. 
    Briefly climb out of the window to lure some of them into the priest's line of 
    fire. Then use the gravity gun against two fast headcrabs on the ledge 
    opposite of the windows. Look down: Lost of enemies around, right? Well, 
    simply blow up one of the barrels on the right and use the gravity gun on the 
    barrel to the far left to (hopefully) clear the area without getting near any 
    enemy. Then carefully drop down (killing the survivors, in case there are any) 
    and blow up the barrel behind a screen to access the hideout of some poor guy 
    who has been overrun by a couple of poisonous headcrabs.
    Climb up the ladder at the other end of the passage and walk over the girder 
    not to the first window, but to the one on the left. Deal with a single 
    headcrab that is guarding some items. Kill a zombie at the other window (using 
    the pistol, as the crowbar is too dangerous up here) and get into the 
    building. Prepare for some fun: There are lots of objects to be grabbed and 
    tossed and down the stairs you will face lots of zombies. So use the gravity 
    gun on anything you can find to wipe out the enemies.
    [New Faces]
    Thought Ravenholm wasn't so scary after all? Grab the items around prior to 
    leaving the building. Look straight...see something coming your way? That's 
    some freakin' fast mutant and his companions will surely panic you a few 
    times. Use the SMG on them; the gravity gun takes too long. After celebrating 
    your first kill of a super zombie, walk over to the left and hop down to the 
    rails, disposing of a total of three headcrabs and three zombies, all with the 
    gravity gun to save precious ammo.
    Enter the centre building with your gravity gun equipped to wipe out two 
    zombies on the ground level, a zombie and two headcrabs behind the wooden 
    boards on the first storey, two zombies (guarding health paks) behind the door 
    on the first storey and then again another one of those easy targets crawling 
    about on the ground level. Go to the top storey to crush to headcrabs before 
    being given the shotgun by Grigori outside.
    Either use it against a troop of super zombies or simply aim for the water 
    tank ahead and jump into it. This way the enemies ignore you, leaving Grigori 
    to take them out. Climb up to trigger some additional super zombies. If you 
    are quick about it, you can grab a hold on some gas tanks in the room nearby 
    to deal with them. Otherwise use the shotgun and consider backtracking for 
    health paks after the battle. Call the lift in the room with the gas tanks. 
    See two super zombies climb up again? Shutting the door seems like a good 
    idea, but unfortunately it doesn't help a bit: They just break through the 
    ceiling, so you have to fight them anyway (use the shotgun).
    Ride down the lift and kill any poisonous headcrabs the fat zombie throws at 
    you, with the gravity gun or simply walk over the ramp on the other car 
    directly to get out their reach. Dealing with the fat zombie himself is both 
    too dangerous and a waste of ammo, so don't do it in any case. Clear the small 
    goodie room ahead from a single headcrab, restock and leave the area.
    [Big Battle]
    This set of alleys holds nearly no items, but an infinite amount of all kinds 
    of zombies and headcrabs (except for super zombies). Even the door in front of 
    you that can be opened from the other side is totally useless. Hence, only go 
    for the important places and try to be as quick about it as possible...oh, and 
    the spinning trap also is of no big help, since it breaks apart after a few 
    spins. Still, head for the trap and look right. There is a small balcony with 
    a lever and you have to pull the latter one. Go to the back of the building 
    and up to the lever. Then drop down and turn right where you can climb up onto 
    the small building there. Move on over planks and roofs, but watch out for a 
    super zombie that has been triggered to come after you.
    For the moment, you are quite safe up on the roofs. Some poisonous headcrabs 
    eventually leap up, but that's it. Pick up some goodies on the roofs, hop over 
    the platform you have moved via the lever and note that you have just left 
    safety again. Speed over to a balcony above the entrance to this area and 
    climb through the window as most of the balcony collapses. Now you have the 
    time to turn around and see why you hastened through there: Infinite super 
    zombies! Shoot them from a distance, watch Grigori fire at them or just move 
    on; it's up to you, as they somehow cannot get to your position. The upcoming 
    passage is pure relieve. Pick up the saw blades via the gravity gun and fire 
    off at lots of normal zombies.
    [King of the Hill]
    Go down the stairs on the left to get back to a goodie room you already 
    visited a few minutes ago. You've probably left some items here the last time, 
    so the lone zombie guarding it shouldn't hinder you from going there. Next, 
    throw a grenade up the ladder as a direct battle with the three headcrabs up 
    there is pretty health consuming. Leave through the door, give two super 
    zombies a taste of your shotgun shells and hop from roof roof until you can 
    safely drop down. Run past the poisonous headcrabs and their big mate and walk 
    up the stairs just next to a headcrab missile. As you proceed, a super zombie 
    climbs up from behind, so await him with the shotgun.
    Shortly after, you will find yourself on a roof. Turn right to see Father 
    Grigori, who tells you to defend yourself while he brings over a cart that 
    will get you over to him. Grab the ammo around and look straight down the 
    street. From time to time super zombies will come along here, climbing up 
    either the left or the right red pipe. Watch where they are going and position 
    yourself on top of a pipe accordingly to shoot them down in their attempt to 
    get up. Luckily you basically can only hit their head in this situation and 
    they cannot dodge your attacks, so this should be rather easy to you. Another 
    nice aid by the designers is that you can clearly hear those beasts climbing 
    up, so even if you have overlooked one of them, you will know that it is 
    coming. Since there are infinite zombies coming your way, you better jump into 
    the cart as soon as possible (Grigori is definitely taking his time, though) 
    and release the hand brake on the roof right next to the cart. Stock up on 
    items, listen to the somewhat crazy priest and follow him to the next area.
    [Tales from the Crypt]
    After a short walk past the fence you are attacked by numerous super zombies. 
    Keep moving around as you first of all kill any enemies that go after you. 
    Grigori can take quite a lot of damage, so only help him out when you are safe 
    or if he has to deal with three enemies at once while you are only pestered by 
    a single one.
    Then over another fence and onto the graveyard. Equip the gravity gun and use 
    it against lots of normal zombies. You will find many saw blades and concrete 
    blocks and in addition Grigori helps out a lot, so you really don't need to 
    waste any ammo. Your main task should be to look out if any enemies come from 
    behind. Once your back is clear you can have a look if it is necessary to help 
    Grigori. Watch out with those explosive barrels and you probably won't have 
    any problems here. At the end your ally opens a gate for you to crawl through 
    while he stays back to watch over his people...yeah, whatever. If you want to, 
    stay there for a while and watch Grigori kill lots of zombies or just move on.
    [The Mines]
    Look down the shaft. There are wooden bars at the walls, which can be used to 
    carefully drop down. Fall from bar to bar until you come to some health paks. 
    Turn left to find some supply crates in a small room. Carefully drop down to 
    the ground where an infinite amount of different headcrabs roams around. Thus, 
    quickly run over to some stairs near a blocked tunnel, walk up the stairs and 
    jump over to the bars on top of the gate. Try to stay up there, so you can 
    easily shoot the (non-infinite) headcrabs below with the pistol. Also use the 
    explosive barrel to your advantage. If you happen to fall down behind the 
    gate, equip the gravity gun, clear the area and ignore the barrel; it's too 
    Across the gap you can see some health and ammo. In order to get them you have 
    to quickly step over the bar on the right, as it breaks apart when you do. 
    Down in the water you better not turn on the flash light. There's near to 
    nothing to see and you need quite some air to get through. Surface near the 
    Branacle tentacle, jump over the wooden gate and dive on to a long tunnel, 
    leading to the surface. Turn on the mine cart which will constantly ride up 
    and down, being a threat both to you and any enemy. Walk up to bait a few 
    zombies following you out of a niche on the left. Go back to watch them being 
    overrun by the cart, then go into the niche yourself. This triggers some more 
    zombies up ahead, as well as some more as you go into the second niche. At the 
    end of the cart path you will face your last zombies before running up into 
    the sunlight.
    Wonder what Valve had in mind for you once you reach the daylight for the 
    first time after leaving Ravenholm? It's, it's, IT'S...a railroad 
    Besides the health on your left and some supply crates you can also grab some 
    good ammo by climbing over the crates to your right, disposing of a poisonous 
    headcrab and crawling in at the yellow lambda symbol. As you move on, a super 
    zombie starts its long way towards you. Without the darkness and with so much 
    time for preparations they kinda've lost their scary impact. Blast him with 
    the shotgun. A few moments later you will see three zombies being taken out by 
    a Combine sniper up in the bridge-like construction. Wait until he's done with 
    them and then toss a grenade into the sniper's window. Don't worry: He cannot 
    hit you unless you go out too far.
    Another sniper, but this time you are right in his area of view. Hide behind 
    the train, wait for him to shoot, then run over to the crates on the right, 
    again wait for him to shoot, advance a few feet and after that hide behind the 
    next wagon (the one with the wood on it). Do yourself a favour and don't try 
    to be too smart, by picking up some junk with the gravity gun, using it as a 
    shield; a single sniper hit will break through the object right into your 
    body. Crawl along under it on the left and kill a headcrab with the gravity 
    gun. The rest is fairly simple. Move around the red wagon on its left side and 
    throw a grenade up into the window. Inside the wagon you can find some ammo.
    Pass the dark area to witness a small battle between two Combines and some 
    aliens. Don't just watch it, though, but manipulate it to your advantage: 
    Blast the soldiers with the shotgun while they are distracted. The remaining 
    zombie and headcrab are a pushover for your shotgun. Grab the pulse-rifle in 
    the container. Out in the open you trigger two Combines to enter the yard on 
    the left and another one to come along the rails up ahead. Light up the 
    explosive barrels on the left and retreat back into the tunnel, so only the 
    lone Combine in front of you can possibly hit you. Use the pulse-rifle against 
    him and eventually against the two others if they survive the barrel 
    explosion. Go around the train wreck and onto the yard to trigger two more 
    Combine coming out of the building ahead. Pick up a barrel with the gravity 
    gun and toss it at them. Then enter the building where you witness another 
    battle; this time between four Combines and a few rebels. Assist them (you 
    know who I mean). The rest is only conversation and restocking.
    -=-=-=-=-=-=-=-=-=-=-=-=-=3.7 Chapter 7 - Highway 17=-=-=-=-=-=-=-=-=-=-=-CC7
    Enter the buggy (See the ammo crate at its back? There's unlimited SMG ammo in 
    it.) which will be set down by the crane automatically. Also note that the 
    buggy can be put back up if it gets knocked down, by using the gravity gun. As 
    you might have already heard, it's mating season for the antlions. You don't 
    risk being humped like when meeting Lamarr, but these big insects crawl out of 
    the sand, afterwards trying to assault you via jump attacks. Unfortunately 
    there's an infinite amount of those creatures in the ground, so you should 
    hurry and get away from the beach. Since there is absolutely nothing to find 
    anywhere near the beach, just follow the shore on the right until you get to a 
    cliff near a pier. Once you have driven up there you are completely safe from 
    the antlions. Take your time to jump over the gap up ahead (use the turbo by 
    pressing Ctrl as the standard key config). Search for items in the hut and 
    drive through the tunnel.
    [Gunship #1]
    Head back to the beach past the cliff ramp on the right and quickly move on to 
    the machinery on the far left. It may resemble an oil pump, but it actually 
    serves as an antlion blocker. Those pesky creatures cannot come near it...when 
    it is turned on, that is. You can shut it down, but why would you? Ok, except 
    for some antlion annoyance: Turn it off, watch the enemies close in and turn 
    it back on again. ^^
    Go over to the house and to the cellar entrance on the right. Swiftly clear 
    the opening with the gravity gun as this spot is out of reach of the antlion 
    blocker. Hop down to be safe from the insects again. Kill a poisonous headcrab 
    (gravity gun) on the upper level, before getting up yourself. Go over to the 
    chimney (there's an SMG grenade in there) which triggers a fat zombie. Simply 
    drop down and make use of the grenade crate. Time to leave the house through 
    the main entrance.
    Drive through the thin wooden fence and haste along the beach to the next 
    antlion blocker. Get off the buggy, pick up everything in the barn (there is 
    an SMG grenade on the truck) and walk up the stairs to the main house. Inside 
    you have to prove yourself against two Combine (shotgun) and another one that 
    is triggered outside the house in the meantime. Activate the zoom station (or 
    send me a better term for it ^^) to realize the Combine are already watching a 
    rebel outpost you are heading for. Speed on in your buggy, only stopping for a 
    Combine squad at an antlion blocker. The buggy cannon shreds the patrol apart 
    in no time. Simply "reel in" the two supply crates with the gravity gun 
    instead of jumping down.
    After reaching the repel outpost, get off the buggy, search for items in the 
    various buildings and only then enter the basement of the big house (one of 
    your allies will show you to it after a while if you can't find it for any 
    reason). You are handed out the bazooka, given the perfect chance to practice 
    with it as a gunship appears outside. You have already seen some of these in 
    Water Hazard, but now they are armed...highly armed. Go up the stairs to the 
    balcony and fire off a missile. Not directly at the gunship, though. Then wait 
    for it to get behind the gunship and steer it in on your adversary. This way 
    you will probably get hurt quite a bit, but since you'll find loads of medi 
    kits around, it is more important to strike as hard as you can. Gunships can 
    blow up your missiles in midair if they hit them; that's why you need to play 
    with them. When you run out of missiles first look in the basement, then in 
    the small hut near the basement entrance, then inside the garage and if you 
    still haven't won the battle you should look inside the second to largest 
    house. One of your allies eventually gives medi kits to you and another one 
    gives new missiles to you.
    Once you're done, restock and talk to the colonel in the basement to get the 
    gate opened. Board the buggy, approach the gate and get off the vehicle again 
    to let your suit be powered up by a vortigaunt. Then ride on.
    [Magnet Power]
    Try to break open the first supply crate ahead (at the crash site) from a 
    distance with the secondary fire of your buggy cannon. If you really need it 
    you might also get off for the second one and open with the gravity gun, but 
    this is pretty risky. Ride on on the right strip of sand until you see a 
    Combine buggy being crashed on the left. Shoot the two Combines trying to 
    escape from a distance as well as the other one on the pier on the right. Then 
    position the buggy near the crane and disembark. Activate the antlion blocker. 
    Walk up, equip the shotgun and go around the container to face a Combine. 
    Another one has spawned near the antlion blocker. Open the supply crates 
    before climbing up the ladder to kill two more Combines. Use the pulse-rifle 
    on the remaining enemy on the crane.
    Find another supply crate inside a container prior to entering the crane 
    platform. Lower the ladder on the right to create a quick path you can take if 
    you have to reposition the buggy. Why reposition it? Well, you have to use the 
    crane's magnet to carry the buggy up to the warehouse nearby. As you turn the 
    magnet over to the building, three Combines open the gate and rush outside, 
    desperately trying to hit you. Relax and take your time thinking of fun ways 
    to dispose of them. Drop the buggy, grab a container, swing the magnet, etc.. 
    Then hit the bridge with the crane to lower it and go over it towards your 
    buggy. Hit the explosive barrels behind the gate to rid the hall of three 
    enemies and activate the switch at its end. See the map? Seems like the 
    Combine know about all the rebel outposts.
    Drive through the newly opened gate and decide whether you want to act like 
    some movie hero or like your typical Ego-Shooter hero: Either drive past the 
    four Combines, into the next hall and up the ramp through the window, or halt 
    nearby and clear the area before driving up the ramp. Either way you should 
    stop after the jump to break open a supply crate. Continue on the street along 
    the cliffs.Boost over the gap and ignore the gunship for the moment; the buggy 
    gun is totally useless against it. Stop near some car wrecks blocking the path 
    and give the insectoid copter a taste of your rockets. Medi kits and rockets 
    are scattered around, the latter one even in a bottomless crate. After your 
    victory, toss the obstacles down the cliff or at least somehow out of the way, 
    employing the gravity gun and drive on. Stop at the blue van for some 
    Oh, how nice. Isn't that D0g's ball? Kinda! These things really are 
    intelligent mines that will electrify Gordon or explode in water or near an 
    explosion. Hence disembark, equip the gravity gun and play fetch with the 
    ocean. Near two car wrecks you will have to destroy two more of them and after 
    a little while, guess what, three of them.
    Approach the shack in your buggy. Its cannon will definitely be of great help 
    against the three Combines. Get off, open the back door of the house and climb 
    into the buggy again as you have just triggered three more of your nemesis. 
    Search the whole estate for goodies, but watch out for two Combines being 
    triggered as you close in on the supply crates in the loft.
    Drive on, disposing of three Combines almost already by simply shooting a 
    truck that's loaded with explosive barrels. Then disembark near a pile of 
    wrecks that block the path and pick up the crossbow on the small hill. Use it 
    to take out at least one of the enemies in the provisional Combine outpost up 
    ahead. Clear the street, drive near the force field and pick up a barrel with 
    the gravity gun. Go straight and just around the corner to see lots of Combine 
    near a police car. Toss the barrel over and repeat with another one before 
    retreating to your buggy. Stay on the bridge and wait for your opponents to 
    show up so you can snipe them away one by one with the crossbow. Use the 
    pulse-rifle in case you run out of ammo. Afterwards easily deal with two 
    mines, search for items and then push the police van away as it powers the 
    force field.
    [Leaving the Buggy]
    Roll over the stupid Combine that comes running out of the small house. Then 
    approach the small settlement, disembark and clear the first house on the 
    right. Luckily, this won't trigger any other enemies to head for you. 
    Afterwards run to the left-most house and kill the lone enemy while you keep 
    running. A few enemies will appear behind you in the meantime, so the house 
    provides some cover for you. Once you have killed everyone, enter the big 
    house, place a table or anything else under the broken stairs and get up. 
    Besides some items you will also find a fat zombie here, but he shouldn't 
    cause any problems; run past him. Outside is a path leading down and to the 
    underside of the bridge. Ignore the headcrab and the fat zombie.
    [The Bridge]
    Walk straight to some stairs. Either go up for some health and suit energy or 
    just directly get outside. Drop down onto the girder platform and proceed on 
    the bars, only watching out a bit for the Barnacle. Give the headcrab inside 
    the shack a taste of physics, pick up some stuff and again proceed on the 
    metal bars up to a platform with a ladder both leading down to some medi kits 
    and up to another shack. Step out, snipe at two Combine on your right, climb 
    up the ladder in front of you and drop down on the bars at the end of the 
    walkway. Advance to the next shack, kill two headcrabs with the gravity gun (I 
    wonder why they didn't attack the Combine) and take the right walkway to reach 
    the end of the bridge. Look for a supply crate before entering the bridge's 
    Move on until you see an explosive barrel standing on a platform to your left. 
    Wait in the entrance and blow up the barrel to get two Combine caught under 
    some metal bars. Step onto them and shoot another enemy with the shotgun. 
    Return to the entrance, look up and defeat quite a lot of Combine with the 
    pulse-rifle. Killing them a bit later face to face is too dangerous and 
    tossing grenades at them rarely succeeds as they dodge them. Then open the 
    supply crate nearby, traverse the room, go outside and take out a lone guard 
    high up on a sentry turret with the crossbow. Climb up and look for two more 
    supply crates and eventually any Combine survivors. Walk up the stairs in 
    another room and throw a grenade through the force field to hopefully kill two 
    Combine. If they survive, stay back and welcome them with the shotgun once 
    they leave the room. The grenade has already lowered the force field (if you 
    haven't got any grenades, simply use the gravity gun on the plug...talking 
    about high tech), so restock at the wall panels and activate the switch which 
    deactivates a force field near your buggy.
    Get back down, killing two Combine as you quickly run back to the entrance of 
    the bridge's interior. Why quickly? There's a gunship on your track. Haste 
    over to the first shack via the walkway, hide there for a moment and then 
    REALLY haste over the bars and broken platforms over to the platform with the 
    ladder that leads up to another small hut. Don't think too much on your way 
    there, just look down at the platforms and mainly aim for the broken platforms 
    lying on the bars. The path is relatively straight forward, so you can do it. 
    Oh and watch out for the Barnacle. Enter the hut and walk outside to begin the 
    battle with the gunship. Luckily your opponent will circle your platform 
    mostly staying close to you, so he rarely gets a chance to blow up your 
    missiles in midair. Afterwards, climb down the ladder to where you hopefully 
    still have some medi kits left. Then back onto the medium storey and up the 
    other ladder. Follow the walkway to its end, switch over to the metal bars and 
    advance to the next shack. Now just walk along the left walkway and after a 
    quick drop nearly straight ahead you are back to the exit of the bridge.
    [Back to the Buggy]
    Watch the scene a bit until you feel like the path is somewhat clear. Equip 
    the gravity gun, ignore the fat zombie if he's still alive and push any other 
    enemies out of the way as you run by. In case the remaining antlions are not 
    getting in your way you could also leave them be, make them chase and lead 
    them up to the Combines you are about to face (thanks to Baconator96 for 
    this). Equip the pulse-rifle once you are back up at the houses and take cover 
    in one of them as four Combine await you. Board the buggy (admit it: You've 
    missed it...right?) and ride up the steep path near the rocks onto...another 
    railway. Valve really loves those, eh? Speed past the train and as you hear 
    another train approaching from ahead, either boost through or switch to 
    reverse and wait for the train to pass by. Then drive up the broken bridge 
    into a tunnel to reach the next chapter.
    -=-=-=-=-=-=-=-=-=-=-=-=-=3.8 Chapter 8 - Sandtraps=-=-=-=-=-=-=-=-=-=-=-=CC8
    [Battery Search]
    Crash through the first zombie, shoot another one while he still lays on the 
    ground and disembark. Don't worry; it's not for too long. Open a supply crate 
    on the right (you probably need it at the moment). Crawl through a vent and 
    kill two headcrabs with the gravity gun for a lot more good stuff. Cute how 
    the zombie bangs at the window, isn't it? Leave the room and kill him as well 
    as another one behind the fence. This triggers three super zombies to rush in 
    on you. Retreat to the buggy. Its gun will shred any enemy apart in no time, 
    so also use it against some normal zombies eventually showing up. Then clear 
    the path via gravity gun and ride out of the tunnel.
    Surprise two Combine in front of the house by hitting them hard with your 
    buggy gun. Get off, break open the supply crate and enter the building at its 
    back. As you search for goodies, equip the gravity gun, because on the highest 
    storey two mines will fall down a hole in the ceiling. Grab one of them, toss 
    it into another corner of the room and then pick up the other one, throw it 
    against a window and through it. Now also grab the first one again and throw 
    it out as well. As you walk back to the buggy three more mines come crashing 
    down; simply repeat the procedure.
    Drive on to a Combine outpost. Eliminate the guard on the tower with the buggy 
    gun, disembark and toss two mines away down the beach. Don't take the path the 
    Combine had in mind for you; instead walk around the barricade on the left, 
    enter the house, grab the radiator with the gravity gun and use it to kill two 
    Combine which expected you to come along the street. Leave the house where you 
    entered it and look up at the barricade to see another Combine. Still carry 
    the radiator with you, walk over to the entrance of the outpost and wait for 
    an enemy to leave the base and run right into your arms. Again, grab the 
    radiator and walk over to the shack where the last enemy awaits you. Use the 
    health panel if you need it and then drive on. Try to avoid those yellow-black 
    striped ground panels which are likely to stop you, requiring you to disembark 
    and push the car out of the trap.
    Drive on until you see a crashed truck in your way. Ride up the little hill to 
    the right of it at full speed (no turbo boost) to get past it. Disembark. Two 
    gunships will come by, but luckily they won't attack you directly (or at least 
    not that hard as they usually do), but drop down five Combine behind the gate 
    up ahead and two mines before the gate. Throw the latter one into the water 
    and climb back into the buggy before the real enemies close in on you. Have 
    the buggy stand just behind the truck to have the whole street in sight. The 
    Combine come in from the left (only one) and just above the cliffs on the 
    right (four of them). The buggy gun should easily deal with this situation. 
    Now look around for items (there are lots of them) as well as for two 
    batteries you need to insert into the gate console inside the house. One of 
    the batteries lies on top of the mill (throw something up there or shoot the 
    objects on the mill) and the other is on the bed in the house. Also enter the 
    seemingly useless bathroom, hop onto the sink and jump to mysteriously pick up 
    a nice amount of items (thanks to AparoidX for pointing this out). Proceed 
    into the tunnel.
    [The Light House]
    Ah, finally: The light house. Proceed to the rebel outpost and park the buggy 
    in the garage to your left as you are told to. Head for the stone wall behind 
    the garage, hide there and equip the pulse-rifle. You are about to fight the 
    fiercest battle in this game so far. Stand on the left side of the low wall 
    section and look over it to see when the first dropship has landed. Once it 
    has, run around the wall and position yourself left of the dropship. Four 
    Combine are about to debark and since they always hop out onto the very same 
    spot you can quite easily nail them with a short pulse-rifle blast. A nice 
    shoot-hit-ratio is when you have to reload after every two Combine. When the 
    transporter leaves again, turn around to see another one. Carefully move along 
    the wall and once the enemy vessel has landed, position yourself to its right 
    where you can kill four more Combine with ease. Then run straight to the play 
    ground and up to the rock near the house. Duck here to avoid the dropships 
    fire. Equip the crossbow and try to hit as many of the Combine with it as you 
    can, before switching to the pulse-rifle. Next, head for the light house and 
    run around it on the left side. Two Combine will head for you, while the other 
    two stay at the front side of the light house. Quickly kill the latter ones as 
    a gunship has appeared. Enter the light house and pick up some health and 
    rockets. Head for the top to fight the gunship. There's a rocket crate a 
    storey below and throughout the whole building you will find medi kits, but 
    still this battle is hard. It takes a while to take cover, you usually need 
    some time to find out where the gunship actually is whereas it already opens 
    fire and it stays far away for most of the time. Luckily there's a rebel 
    inside the tower who provides you with medi kits from time to time, so just 
    relax for a few minutes at the basement if you have already nabbed all the 
    items here.
    Phew, finally the battle is over. Head for the settlement to loot it from 
    anything you need. The rebel in the light house opens up a secret path down in 
    the basement when you follow him. Take the path, break open the supply carte 
    and afterwards just ignore the newly landed Combine and the headcrab. Run past 
    them into the next area.
    [Sand...lots of Sand]
    Don't even bother trying to save the two poor rebels from the antlions. Once 
    they are dead, kill the antlions with the gravity gun and pull any good 
    objects to you with it. He said not to get onto the sand and you better listen 
    to him, because if you don't antlions will appear...every time you do. Jump 
    from rock to rock (place pallets between them via gravity gun if you feel 
    unsure), pulling in two supply crates from the left. Then hop over the trash 
    onto another rock and pull in the trash afterwards to build a path over to the 
    next rock. Continue your jumping until you reach a big valley.
    Take the obvious path, which means to hop up to the big rock, go along, hop 
    down to the wooden bars and walk over them to a small puzzle: Jump onto the 
    seesaw, grab the crate at its end and place it at the other end. Then quickly 
    run to where the crate used to lie and jump onto the rocks. On the right you 
    can see a small house. Go there, picking up some good stuff and finding two 
    supply crates at the end of the pier. Duck on the pier and aim at the broken 
    boat to pull in two more crates, but make sure to duck and to aim well all the 
    time or else they disappear under the pier. Far behind the boat are more 
    crates, but the hassle to get them isn't worth it: You would have to place 
    crates and such in front of you, jump over them, pick them up again, place 
    them in front of you and so on. Instead either create a short path over the 
    sand back to the rock or simply jump there. If you're lucky you won't even 
    trigger an antlion here when briefly landing on the sand.
    Now you have to get over to the hut behind the trench. Place the plank so that 
    it is half over the trench and half on the rock you are standing on. Put any 
    objects you can find on the rock side of the plank to stabilize it when you 
    run over it. Pick up all the stuff in the hut and if you want to you can also 
    place the barrels on the rocks behind the hut to get up to another shack. I 
    don't really recommend this, though, as there is nothing to be found except 
    for a supply crate and it is pretty hard to get up there. Head right for the 
    rock under another hut and place the pallet in the sand in front of you. Then 
    grab the door, drop down onto the pallet and place the door in front of you. 
    Walk onto it, grab the pallet and place it in front of you. Grab the do- oh, 
    you've already got the idea? Great.
    Place the door on the sand between the rock and the wooden ramp to get up to 
    some goodies. Then walk to the back of the house on the lower rock. Turning on 
    the generator activates the antlion blocker. Ignore the crates on the rock and 
    on the beach to your right. Simply run to the antlion blocker and past it up 
    the rocks near some junk. Also ignore these crates here unless you are 
    desperately in need of health. Drop down to start the battle with some sort of 
    antlion queen. Run straight to the other end of the pit and circle around a 
    rock to protect yourself from the ram attacks of the queen. Use the shotgun 
    mainly on the normal antlions when they come too close and in between the 
    antlion attacks, also damage the queen. After a while a rebel will assist you 
    by manning a machine gun. Stay in the area you are at the moment so your buddy 
    can continuously deal damage to the antlions and the queen. At the beginning 
    of the pit you can find some supply crates, but the path to them is too long 
    and furthermore they are out of sight of your ally. Wait for the big bug to be 
    defeated before opening the crates.
    A vortigaunt comes out of the rebel hideout, telling you to pick up the 
    pheropods inside the queen. Do so and follow him into the outpost where 
    nothing special awaits you, except for some crates and a nice dialogue between 
    two vortigaunts. At the end of the base you will get a training unit in the 
    use of pheropods. From now on no antlion will ever attack you and furthermore 
    you can even control them. Toss one of those bug baits into the pit, then one 
    at the Combine suit and then use the alternative fire mode to make the bugs 
    follow you. Afterwards approach the provisional gate and wait for it to be 
    Deactivate the first two antlion blockers (climb up the ladder to do so) and 
    approach a rock on the beach. As you do, some Combine will rush out of a 
    bunker. Throw a pheropod at them before hiding and waiting. Then loot the 
    bunker and move on to another one which you clear the same way. Enter the 
    bunker, deactivate the alarm and use the machine gun against four Combine 
    closing in from the beach. Some supply crates are behind the bunker. Turn off 
    the third antlion blocker. Note that you have four antlions at your heels. 
    Even if one of them dies, others will spawn so you always have four of them. 
    This makes them a great and cheap weapon you should always use unless you want 
    them to distract some other threat.
    Throw pheropod in the direction of the next bunker. Once your bug friends have 
    run past you, head for the first rock on the beach ahead. Throw a pheropod at 
    the Combine in front of you while you stay hid behind the rock. Then again 
    bait the antlions towards the bunker and run along the beach up to a big heap 
    of rocks. Run up the grassy area onto the hill and past any Combine. Try to 
    kill them (with the pulse-rifle) but don't stop. Eventually the pheropod's 
    smell wears off so the antlions automatically come by to help you out. Throw a 
    bug bait at the bunker. Unfortunately your bugs won't reach it as the machine 
    guns inside will tear them apart, so go back to the beginning of the grassy 
    area. The enemies inside the bunker will concentrate their fire on you, but 
    they won't hit you, giving the antlions enough time to clear the area. Nab all 
    the goodies inside.
    Now enter the big bunker in the rocks, sending in your new friends first. They 
    will both powerfully and intelligently wipe out any manhacks and Combine they 
    encounter here. At the far left corner is a room hidden behind a barrel in 
    which you will find lots of items. Leave the building and clear out another 
    small bunker with the pheropods. Either wait for the bugs to clear the second 
    one far up ahead or enter the first one and use its machine gun.
    Walk out to the big open field and throw a pheropod in the direction of the 
    (so far) unmanned bunker. Infinite Combine rush in from the far right, trying 
    to reach the bunker. Your bugs should take care of them while you head for the 
    bunker. As soon as you enter it, the Combine stop spawning. Go along the 
    cliffs, jump over the pole and shoot down two zombies with the pistol. Push 
    the two wooden bars aside so the plank can be used as a ramp.
    Throw up a pheropod against two Combine, climb up the ladder, hop over to the 
    supply crates, look closely for two more (guarded by a headcrab) and again use 
    the power of the pheromones against some Combine high up. Climb up the rocks 
    to enter the sewers.
    As you leave the canal, toss up a pheropod to the left. This will distract the 
    guard towers while you can safely climb up the ladder. Snipe at the two 
    Combine on the leftmost tower; then send in the bugs on the centre one. 
    Finally hit one of the guards on the third tower with the crossbow and let the 
    insects do the rest to clear the yard. Move on and throw a bugbait over the 
    fence to get rid of some more Combine.
    For a few minutes the antlions will sadly lose their power as you will face 
    two gunships. Attack the first one as hard as you can and nab the missile 
    under the low roof on the left and another one on top of a supply crate at the 
    left wall. Then rush into the corner room, killing two Combine with the pulse-
    rifle (the antlions would be too slow here) and refilling your health and suit 
    energy. Throw a pheropod at the guard hut up ahead and run around the left 
    corner into a container. Assist your bugs by firing at the Combine above you.
    Step out of the container, turn around 180 degree and throw a pheropod up 
    ahead. Then walk up the stairs, grab the two missiles and retreat back to the 
    container. I hope you've been aiming well so far, because if you did you can 
    destroy the first gunship now, which makes the whole situation a lot easier. 
    Run up the stairs again and open the missile crate. Against a single gunship 
    you can run around the area where the crate lies and hit the enemy as hard as 
    possible while constantly strafing around. Search for items after this really 
    fierce battle (don't overlook the medi kit inside the container near the 
    missile crate).
    Nearby is a newly blown opening in the wall. Step in and shut down two gas 
    valves. It's time to leave your new insect friends.
    -=-=-=-=-=-=-=-=-=-=-=-=3.9 Chapter 9 - Nova Prospekt=-=-=-=-=-=-=-=-=-=-=CC9
    [Help the Bugs]
    Down the stairs, into the hole and past a headcrab (gravity gun) is all it 
    needs to see your antlions again. Admit it: You've missed them, right? Show 
    your love by tossing the sentry gun away as well as two more up the stairs. 
    Recover in a prison guard room where you also should switch the cameras to see 
    what to expect later on: Another antlion queen! Go up another set of stairs, 
    push two cannons aside and swim through the next room. Feed some objects lying 
    on the ground to the Barnacles to zip by.
    Climb up the rubble. See and hear the glass breaking above you? As you open 
    the next door four super headcrabs fall down the ceiling. Stay in the hallway 
    and use the gravity gun while constantly moving around. Leave the hallway and 
    drop down one level and enter the hall. Try your best to hit the two sentry 
    guns above you with the barrels and radiators strewn around. If you can't do 
    it, go up the stairs, hide behind the columns and try again with new objects. 
    If you still keep missing you have to run up all the way (guarding yourself by 
    carrying a barrel) and use the gravity gun directly or try to push them aside 
    with a normal gun. Go through the hallway on the highest level.
    [Force Fields]
    Kill a headcrab to clear the path to the queen. Drop down and quickly crawl 
    through the holes in front of you to get to the lavatories where you can 
    circle around while fighting the big bug. Use the gravity gun on anything you 
    can find (except for the explosive barrels which should only be shot at from a 
    distance) to deal lots of damage, especially with the radiators. Once you're 
    done with it, your smaller antlion buddies are at your side again.
    Open the door and send your bugs along the hallway to rid it of some Combine. 
    Against the two sentry guns, though, you have to act yourself. While they 
    concentrate on the bugs you can run along on the left side and crash the guns. 
    Quickly turn around and send your allies down the hallway on the right to 
    fight some additional Combine and manhacks. After the dust has settled, 
    approach the force field at the end of the passage. There are two Combine 
    hiding behind it, but they are dumb enough to come out eventually, being easy 
    enemies for your antlions. Now pull the trigger with the gravity gun and 
    activate the switch inside.
    Leave the room. Around the corner is a newly opened gate. Look under the 
    stairs for a supply crate before moving up. Toss a pheropod at the entrance 
    ahead to both clear the trip bomb and to dispose of the Combine around the 
    corner. Activate the next switch to open yet another gate and search for items 
    on the upper level. Drop down and send your bugs through the gate to take out 
    a sentry gun. Afterwards haste through, pull away the vent girder and crawl 
    through. Hold the plank and the concrete block into the fan to destroy it 
    eventually. Move on, killing a lone Combine with the pulse-rifle and pulling 
    the plug with the gravity gun. Wait a few seconds to give the antlions the 
    time to at least kill any remaining Combine here. The sentry gun on your left 
    has to be dealt with by you, though.
    [Big Hall]
    Walk up the stairs and lob a pheropod down the hall which should be enough to 
    clear it. Advance further, sending the antlions up front so they attract the 
    fire of the machine gun station up ahead. Run behind them and around the 
    corner to get out of danger. Pick up the explosive barrel with the gravity gun 
    and throw it at the sentry guns down the corridor. If you miss you have to 
    enter the room, hide on the right and throw other things at them.
    Go up the stairs and let your insectoid buddies do some more work. At the end 
    of the passage, briefly go up to see two Combine and retreat into one of the 
    cells. Simply let the antlions take care of these Combine as well as of some 
    more in front of the machine gun. It may seem tempting to use it against them, 
    but don't do it (at least not on hard) as you would be under fire from two 
    Don't go over the small bridge, but turn left and once again send the bugs in 
    first to clear the oncoming corridor of a bunch of Combine. Proceed, go over 
    the other small bridge and throw a pheropod into the opening on the left to 
    eliminate a sentry gun and two guards. Stock up in the guard room, activate 
    the switch and watch loads of Combine desperately trying to close in you. You 
    don't even have to do anything to make the bugs tear them apart.
    Simply enjoy. ^^
    Go through the gate nearby.
    [Laundry Hall]
    Freshen up your health in the room ahead. Phew, luckily the Combine have 
    already killed the queen that roamed around here. Toss a bug bait around the 
    corner and then again around the next corner. The antlions distract the sentry 
    guns, while you can attempt to throw a radiator at them or just run into the 
    corridor and hide in the room on its right side. Watch out for the trip bomb 
    in the dark when using the gravity gun through the far-most opening.
    Next, throw a pheropod into the big hall. It might not seem to be good for 
    anything at first, but if you stay patient the bugs will eventually kill an 
    all too courageous Combine and after that they should be powerful enough to 
    clear the hall. Look at the right side of the hall for a dark passage with a 
    toxic zombie. Since there are lots of big objects scattered around, he isn't 
    any true danger. Search for some items and return to the hall.
    Walk up, throw a pheropod into the short corridor on the right, run past it 
    and open a supply crate in a room nearby. Use a pheropod in the kitchen and 
    rush in, hiding behind any solid objects afterwards. Toss something against 
    the left sentry gun and then run to the other one. Stay away from the gas at 
    the hole, since it will easily be lit up. Send the antlions into the corridor 
    behind the hole and once the Combine are dead, run in there yourself and head 
    for the two right-most sentry guns. These can't hit you here, but afterwards 
    the other two can, so hurry when tossing them down. Go back to the open 
    entrance to the corridor in which the two guns stood to find a supply crate.
    Walk up the first set of stairs. Before walking up the second one, throw a 
    pheropod up there. Restock and say good bye to the antlions. Who knows if it's 
    forever this time? Well, I know, but I won't tell you. Don't wanna spoil 
    anyone. Anyway, drop down through the broken window to find out where the 
    gunfire you can hear comes from: The right door is blown open and some Combine 
    come through it. Ignore them, though, as they are totally fixed on an antlion 
    queen. Wait for the queen to win and then first use the gravity gun and 
    afterwards the shotgun to end this battle, which actually is pretty easy in 
    comparison to the other queen encounters.
    Push aside some junk in a corner, crawl outside, break open two supply crates 
    and kill a zombie. You've basically just left Nova Prospekt, but the prison 
    still doesn't want to let you part off. Go through the strange-looking passage 
    and place any object under the ledge on the right so you can hop into the 
    opening before the metal structure outside crushes you. Fortunately you're in 
    no hurry as it takes a while. Defeat a single headcrab and drop down.
    -=-=-=-=-=-=-=-=-=-=-=-=3.10 Chapter 9a - Entanglement=-=-=-=-=-=-=-=-=-=-C9A
    [She's back]
    Drop down and move along until you meet Alyx. Follow her into a lift. Take out 
    three Combine with the pulse-rifle after the ride, but also let Alyx do some 
    of the work. After she has hacked two consoles you are in for a rather hectic 
    battle: Follow Alyx while eliminating various Combine with the pulse-rifle and 
    be quick about it as Ms. Vance is about to take lots of damage otherwise. Once 
    up the stairs, go around the left corner to kill a lone Combine in Alyx' back. 
    When the area is secure, enter a dark room for a supply crate. Then follow her 
    to an interesting story scene. Seems like you didn't really leave Nova 
    Prospekt, but you have just entered its interesting parts.
    Alyx opens the next door, but retreats to assist you from a distance. Open the 
    left door in the dark passage to access two supply crates guarded by two super 
    headcrabs. Afterwards enter the guard room. Find a hidden vent by pushing the 
    cupboards away. Crawl through, killing three headcrabs on the way. At the end, 
    toss the girder outside and hop down to put any surviving headcrabs to sleep 
    with the gravity gun.
    Wait for Alyx to open the left gate. Advance to the guard room and look at the 
    monitor. It shows four Combine approaching the other entrance to this room. 
    Wait for the correct moment to lob some grenades through the broken window 
    towards the gate. Then switch to the pulse-rifle and do the rest. Look into 
    the next hallway to see two more Combine. Give 'em a grenade. Now just one 
    more grenade to the sentry guns inside the hallway and you're done for this 
    battle. Go back to the guard room for a grenade crate.
    Return to the sentry gun hallway, enter the left corridor and throw a grenade 
    around the corner. Equip the pulse-rifle to kill any Combine that has survived 
    there and in the upcoming room. Throw a grenade through the force field into 
    the room with the plug to advance. Lay down a sentry gun with the gravity gun 
    and two more of them with a wide grenade toss down a corridor.
    Dispose of two Combine with the pulse-rifle. After that you have to act 
    relatively quickly. Open the right cupboard (there's a button right at it) and 
    pick up one of those sentry guns, Alyx has just recalibrated. Place it down 
    one of the sets of stairs. Put the other one at the end of the other stairs. 
    Behind the force field Combine soldiers are about to rush in for a few 
    minutes, as well as three manhacks near the end. Stay on the upper level, 
    assist either sentry gun a bit with the pulse-rifle and when one side is clear 
    for the moment, run over to the other side. If you hear a sentry gun siren and 
    a heavy shooting where the gun stood, it has been thrown down. Quickly go to 
    it and put it back up by simply pressing E, walking a few steps forward and 
    backward and dropping it again. Then go back up and assist the other gun. In 
    between you can also use the health panel at the wall. Once the manhacks 
    appear, concentrate on them and crash them at any wall via the gravity gun.
    Alyx appears once again, revealing a shocking bit of story. Carry one of the 
    sentry guns and take a left behind where the force field was. Clear the path 
    from all the junk, go down the stairs and place the gun right in the doorway 
    to easily kill three headcrabs. Break open a supply crate pick up the sentry 
    gun again and proceed to a flooded and electrified room. Shoot the gun over to 
    the platform up ahead (with the gravity gun) and follow it over the pipes. 
    Kill two headcrabs, shoot the cannon over to the exit out of this room (at the 
    fence) and pull in two crates to build a small bridge over to the exit. Jump 
    onto the first one, drop the second one in front of it, pick up the first one, 
    drop it ahead of you and so on until you are back on solid ground. Turn left 
    to see some ammo you can reel in with the gravity gun.
    Move on with the sentry gun. First enter the left room to recover; then walk 
    up to the Combine, which triggers some zombies to stand up and attack you. 
    Simply retreat to the flooded room and place the sentry gun. Up the stairs (at 
    the very top is a supply crate), past the crates and the cupboard which block 
    an entrance and up some more stairs (while still carrying the sentry gun 
    along) to face two Combine. Place the cannon at the opening on the left or if 
    you don't carry it along: Use the pulse-rifle. Pick up some ammo in the guard 
    room and jump down.
    I consider this to be one of the most difficult situations in the whole game 
    if not even the most difficult one: You have to defend yourself against hordes 
    of Combine and manhacks, spawning just about everywhere. Enter a small room 
    with three sentry guns behind a force field. Place two of them at the left 
    entrance of this room and the other one at the other entrance. If you have 
    kept another one all the way as I told you, use it to reinforce the single 
    cannon. Have the pulse-rifle in your hands and watch out for anything around 
    you. If a cannon is pushed aside, put it back up. If a Combine attempts to 
    attack a cannon in close-quarter, kill him. If a Combine appears in front of 
    the cannons, trying to shoot at you, hide in the cupboard. When a manhack 
    appears, switch to the gravity gun and destroy it. The main threat are the 
    grenades, though. Whenever one rolls into your little fort, you better run out 
    and head back after the explosion, putting the sentry guns back in place. 
    Switching to the gravity gun to toss them away is too risky in my opinion. In 
    between the attacks you should refill at the two wall panels.
    ===Alternative Way===
    Vidmo told me of a great way of beating this passage, which affords way less 
    shooting skills, overview of the situation and micro management, but just some 
    quick hopping. I wasn't aware that the attack commences once you have placed 
    all three sentry guns instead of after a set amount of time. So before 
    touching any of them you should grab six crates to build a set of stairs in 
    front of one of the balconies you might have jumped down from. The first step 
    consists of just one crate, the second one of two and the last one of three. 
    Then pick up two of the sentry guns with the gravity gun and toss them up on 
    the balcony. Jump up to position them at the left end of the hallway in the 
    dead end, pointing them to the right side. Get back down and prepare to be 
    quick. Grab the final sentry gun, hurl it up, swiftly follow it and position 
    it as well, before hiding behind the pillar on the left. Combine an Manhacks 
    are going to come for you, so you might want to carefully assist your sentry 
    guns by shooting some Combine and especially by having your gravity gun ready 
    whenever you hear a Manhack closing in.
    ===End of the Alternative Way===
    ===Alternative Way - Even Better===
    MeestahChanggg & Darkpark saw Vidmo's strategy and they improved on it even 
    further: Do not place the crates below the above mentioned balcony, but rather 
    in front of the closed gate, with a health and a suit panel behind it. Now, 
    again, bring up two sentry guns to a short, empty hallway either by hurling 
    them via gravity gun or by jumping up and pulling them up with said weapon. 
    After that, pick up the remaining sentry gun, drop it immediately and make 
    your way up to the other two guns. Just hide in the back of the hallway, 
    letting your two guns do all the work. If a manhack comes near, use the 
    gravity gun, and put the sentry guns back up if a grenade throws them down 
    (which happens pretty rarely). You should be able to defeat the hostile armada 
    with nearly no hassle and no health loss.
    ===End of the Alternative Way===
    Look around for items (there is an SMG ammo crate, but the pulse-rifle is way 
    better of a choice in this fierce battle and you should find more than enough 
    ammo for it after the battle as well) and follow Alyx down the stairs.
    [Dr. Mossmann]
    The lights are turned off, but don't worry: The Combine light up the place 
    soon after. Still have the pulse-rifle equipped and head for the single 
    Combine around the right corner. Move along the right side of the fence and 
    hide between the crates as you somewhat surprise the enemies on the other side 
    of the fence. If you run out of pulse ammo, switch to the SMG. Restock at a 
    health panel and follow the only available path to another story relevant 
    scene. After entering the Combine teleporter hall, turn left and use the two 
    wall panels to fill up your health and suit energy.
    Listen to the dialogue and watch the whole scenery until Alyx tells you to 
    cover here. Place two of the sentry turrets at the glass openings and the last 
    one in front of the force field next to the Combine teleporter. Stay on the 
    centre platform while lots of Combine try to rush in from three different 
    places. The turrets will settle the situation nearly all on their own; just 
    put them back into place if they get struck down by a grenade. If you get 
    hurt, heal yourself at the wall panels. After a while Alyx finally gets the 
    teleporter back up, allowing you to escape.
    [Dr. Kleiner]
    Enter Dr. Kleiner's lab and search for a suit energy panel, an energy item and 
    a supply crate while your allies have a conversation. At the end, drop down 
    into the hole near D0g.
    -=-=-=-=-=-=-=-=-=-=-=3.11 Chapter 10 - Anticitizen One=-=-=-=-=-=-=-=-=-=C10
    Walk out, approach the car wreck and watch D0g going rampage on the Combine. 
    Afterwards D0g will open up a path for you. Go through, climb over the fence 
    and walk over the rubble on the left inside the house.
    [The Uprising]
    Ah, you're back to the play ground - but - they have nearly completely 
    destroyed it. Not it's personal! Proceed to the main station, destroying two 
    sentry drones and meeting four rebels on the way. The uprising really has 
    begun, so take them with you as your squad. Pressing C sends them to where you 
    currently aim at; pressing C twice makes them follow you again. Another rebel 
    drops down some supply crates. Pick up their contents and look out for two 
    Combine opening a gate to your right.
    Usually you would have to clear the hole, jump down and try your best to avoid 
    the blast of the hopper mines, but there is an easy way to get through here 
    safely: Stand on the corrugated iron, look straight down and fire the gravity 
    gun at it. This catapults you high up, allowing you to steer over the fence to 
    the rebel in midair. Enter the left house for some goodies. Clearing the rest 
    of the area is rather useless. You would have to deal with some headcrabs and 
    a lot of hoppers, with only sometimes one of your squad members coming along 
    later on as a reward. Since you meet three new squad members on this side of 
    the fence anyway, I'd say you just move on.
    The strider on your right luckily isn't interested in you and your squad, but 
    the lone Combine on the guard tower on the left is. Use either the crossbow or 
    the pulse-rifle. Then equip the gravity gun and hunt down those headcrabs. A 
    bunch of hoppers drops down from above, so you better know how to deal with 
    them: Simply pick them up with the gravity gun which takes a few moments. Once 
    you have done so, hurl them away with the gravity gun, hence you better watch 
    out to approach them in such a way that they can fly over a rather long 
    distance and not straight into a wall in front of you. If there is no big 
    space behind them, approach them and retreat when they hop up.
    Look on the truck for health, turn on the flashlight and clear the right path 
    of two hoppers. Use the pulse-rifle against a Combine appearing in the window 
    up ahead and another one running in from the left. Search for a medi kit in 
    the hut on the right which triggers another Combine to appear in the window 
    above the other shack. Pull in an explosive barrel and hurl it at him. Move 
    on, firing the crossbow on a Combine down the alley. Then look left to the 
    lambda symbol. Long time no see. At first I though you would have to climb up 
    the shack and onto the balcony, but actually it is far simpler: Approach the 
    left end of the shack to open it.
    Watch out for the hopper near the explosive barrel. It's best just to ignore 
    it and to stay out of its reach. Pick up the barrel with the gravity gun and 
    throw it at the three Combine around the corner. If any survives, fire off 
    some pulse-ammo. If the one behind the barricade still lives, blow up the 
    barrels that stand near him. Pick up the medi kit inside the shack.
    [House Battles]
    Ignore the stairs (there's only some ammo and two zombies upstairs) and leave 
    the building. Go right, fill up your squad with new rebels and enter the house 
    nearby. Down in the basement are some supply crates, only guarded by a single 
    headcrab. Walk up the stairs to the second storey and position yourself at the 
    second glass door on the left. Pull out the shotgun, aim for the Combine 
    behind the door, open it and quickly kill this enemy as well as another one on 
    the left. Now go back and walk around a different corner to find some more 
    Combine. Once the storey is clear, look around for supply crates. Snipe at a 
    Combine standing outside, drop down the hole in the floor and hurl two sentry 
    guns away with the gravity gun, before using the health panel.
    Keep the gravity gun equipped, haste along the street to the right, break open 
    the window on the right with the gravity gun to find a supply crate and when 
    you get close to the Combine barricade, simply ignore it. It will be closed 
    and guarded by infinite enemies, so instead of battling them, enter the 
    building on the left where you kill two Combine with the pulse-rifle (one of 
    them is on a higher level). Watch out for two hoppers, kill another Combine on 
    the stairs and smash some supply crates on the highest storey. Drop down 
    You're at the back side of the barricade and somehow the Combine have stopped 
    spawning. Hmmm. Shoot the few enemies around and walk up to the other 
    building. Enter the right-most room, strike a Combine with a close-up shotgun 
    burst and while you open the crate your squad should deal with the other enemy 
    in the next room. Enjoy the suit energy panel. Enter the cellar, open three 
    crates and wield the shotgun against quite a few Combine in the hallway.
    Walk down the stairs, switch to the SMG (you probably don't have that much 
    shotgun ammo left by now) and again kill lots of Combine in a hallway and in 
    some adjacent rooms. Push the cupboards forward with the gravity gun for some 
    easy kills and use the gravity gun against the manhacks as soon as they are in 
    Down the stairs (refill at the health panel) you have to say good bye to your 
    squad. Pretty surprising actually; they just suddenly aren't with you anymore. 
    Deactivate a sentry turret on the left and then two more on the right. Look 
    down at the ledge to see a zombie crawling around. Kill him with the crowbar 
    before walking up the stairs to some supply crates. Pull them in with the 
    gravity gun, move the gun over the fence and see the goodies come in. Get back 
    down and go along the hallway.
    Meet up with a new squad. Run straight down the corridor, only hurling away a 
    manhack if it gets too close. Since new manhacks will appear ever after, it is 
    useless to destroy them. Climb up the rocks at the end of the tunnel, up onto 
    the truck and on the fence. Drop down, shoot the lock and go on.
    Here now you should wait inside the small room and wait for manhacks to come 
    in so you can smash them against a wall. Open the supply crates; then kill the 
    two Combine right behind the door with the pulse-rifle and head to a lambda 
    symbol down the tunnel on the right. Return to the door and try to position 
    yourself in such a way that you can see the Combine at the right machine gun 
    on the far end of the tunnel, but he doesn't shoot at you. Aim the crossbow 
    between the pillars and take him down. Approach the car in front of the other 
    machine gun to get close enough for another crossbow hit. Open three supply 
    crates. Approach the blocked opening to make a rebel plant some charges at the 
    stuff that blocks the path. Quickly return to the left machine gun and man it. 
    A few Combine and infinite manhacks will rush in on you. As soon as you can, 
    hit the Combine (just look at those explosive barrels; tempting, right? So hit 
    them!) with the machine gun. Against the manhacks the gravity gun is the 
    better choice as it allows you to dodge attacks.
    After a while the opening is...well - open...so go through, try to open the 
    left door and then crawl through another even smaller opening up ahead. I hate 
    this passage...hop onto the car (it sinks!), over the crates and onto the 
    truck. It's time to build a bridge with two objects again. So pick up one of 
    the cable wire things, place it in the radioactive water, pick up the other 
    one, step onto the first one, drop the second one, walk onto it, turn around, 
    pick up the first one and repeat. Don't try to take the seemingly easy way 
    over the solid platform in the centre, as this would trigger lots f zombies to 
    stand up. Instead, stay on the water all the time, also just pulling in the 
    medi kit later on with the gravity gun. This way you will only have to fight 
    two zombies (shotgun) up to the end of the passage. Ignore the two other 
    zombies there, turn left, jump over to the pipes at the wall and walk up. Open 
    any of the vents (it really doesn't matter which one you pick), drop down, 
    smash some crates, open the door for your ally and walk up the stairs.
    Meet another squad member and let him aid you against some super headcrabs 
    while you use the gravity gun and keep moving. Pick up the suit energy on the 
    right side of the car and open a supply crate. Enter the house, kill a single 
    headcrab with the gravity gun and open the crates after dropping down at the 
    Combine barricade thing. Go outside, wait for one of your allies to say the 
    correct password (what a great password, actually... ^^) and enter the 
    building on the right.
    Kill a Combine on the stairs with the shotgun, look for two supply crates in 
    the dark room nearby, rid the stairs of two more Combine with the pulse-rifle 
    and once you're at the top, look down into the small hole and eliminate 
    another soldier with the pulse-rifle. Drop down, head for the room straight 
    ahead, surprise a Combine with the shotgun and approach the window to get the 
    bridge lowered (enter the other room in this building for magnum ammo). Cross 
    it, search for some items and walk up the stairs to find lots of super 
    headcrabs. Use the shotgun as you haven't got much space to dodge attacks. 
    Around the right corner is a medkit, guarded by a super zombie. Drop down, hit 
    the burning super zombie on the lower storey before he gets to jump up to you, 
    drop down, aim for a normal zombie below, drop down one last time and hit two 
    super headcrabs with the gravity gun. Feast on the numerous supply crates, 
    prior to leaving the building on the left.
    Take out the grenade throwing Combine on the roof to your right with the 
    crossbow. Then kill another Combine up ahead with the pulse-rifle and two more 
    in the building on the left. Before entering it, though, you have to clear the 
    path of two hoppers. Equip the gravity gun as you are about to face lots of 
    pesky super headcrabs. Climb up and meet your new squad members.
    Stock up and go outside, sniping at a Combine on the left and three on the 
    right. Lower the bridge with the lever, run across it and defeat two Combine 
    in close quarter with the pulse-rifle. Just ignore the other enemies on the 
    roofs. As you enter the building another Combine hops down from above. Give 
    him a taste of your pulse-rifle as well as two more below. Drop down, smash 
    the supply crates and position yourself near the windows; several Combine will 
    rush in from up ahead, so be quick and precise with the pulse-rifle. Move 
    along the right corridor, look out for an explosion at the ceiling and kill 
    some more Combine on the upper level. Further move to see some more enemies on 
    the left. Go up the stairs and hit a Barnacle above it as well as some more 
    around the corner.
    A super zombie drops down, but the shotgun should take him out quickly. Jump 
    down, dispose of another super zombie and a Combine with the SMG and watch a 
    nice battle down on the lower storey. If a super zombie comes up to you, kill 
    him, of course, but otherwise wait for the battle to end and easily eliminate 
    the few survivors. Go around the corner to where the yellow lambda symbol is. 
    Like a few minutes ago you have to pull in some supply crates with the gravity 
    gun and move them over the gate. Afterwards go around the corner into another 
    [Guarding Alyx]
    Duck to get the sentry tower into the reach of your gravity gun. Then drop 
    down, kill a headcrab and restock at the wall panels while Alyx makes for a 
    great return. Enter the living room to trigger a lot of Combine to come by. 
    Use the pulse-rifle against them and hide behind the furniture every few 
    seconds. Proceed to another suit energy panel, go down the stairs and take out 
    another Combine with the pulse-rifle. Alyx assumes there's some sort of 
    command station in the next room. While she will storm through the right door, 
    you are assigned the left one. Open it and strike hard at three Combine with 
    the pulse-rifle.
    Walk outside onto the square. Alyx heads for the control station at the liquid 
    shield thing, trying to expose a crucial energy core. In the meantime you have 
    to defend her. This might seem hard and it can be, but it doesn't have to. 
    Ignore the single guards on the watch tower and on the balcony; your squad 
    will deal with them. You just position yourself close to Alyx. Destroy the 
    manhacks with the gravity gun and except for that, mainly stay behind the 
    shield and use the panels if you need to. Infinite Combine rush in from the 
    sides. Your allies stay close to you and if you are where I tell you to be, 
    they will be pretty safe (especially since they duck behind the low walls) and 
    they should keep most Combine away. Whenever an enemy still manages to get 
    close to Alyx or even just close to the fountain, get out and quickly kill him 
    with the pulse-rifle. Otherwise watch the Combine and if you see that a few of 
    them stand close together, step out and toss a grenade at them. Even if it 
    misses them, it still slows them down. Absolutely do not try to run to the 
    enemies here. It is dangerous and useless at the same time as new ones spawn 
    nearly immediately. The tactic I suggest you keeps the Combine alive for a 
    long time, but this isn't a bad thing, as they don't do any harm and as none 
    will spawn as long as the older ones still live. After a pretty long while, 
    the energy core will finally be visible, yet it still is protected by a final 
    layer. Wait for Alyx to tell you that it is time to use the gravity gun on the 
    core. Do so, kill two elite Combine (yup; a new kind of enemy) and retreat 
    with Ms. Vance through the newly opened gate. Watch her climb up if you want 
    to or just enter the canal instantly, smash a supply crate and go down the 
    [Separated again]
    Use the gravity gun to pull up the wooden bar that blocks the door. Open it 
    and while you're at it, stick with the gravity gun. Destroy two manhacks with 
    it. Then pull away one of the barrels on the right, climb up onto the pipes, 
    destroy two more manhacks, crawl through the vent and, guess what, destroy a 
    manhack. Don't drop down just yet. Instead pull down some of the cardboard 
    boxes up ahead to reveal a supply crate which you also pull down. Once you are 
    down, too, several manhacks come from the left. Destroy them to get access to 
    some health and suit energy behind them.
    Enter the staircase and toss a grenade up and left to hopefully dispose of 
    three Combine. If any survive, use the magnum. Drop down from storey to storey 
    (ignore the zombies or use the pistol against it) until you see two more 
    Combine in front of you. Like so many times before, the pulse-rifle works 
    best. Then turn around and search for a ladder at a pipe. Get to the upper end 
    of the ladder and climb down to find two supply crates. Climb back up, enter 
    the room to the right of the Combine corpses and take care of a toxic headcrab 
    with the gravity gun. Also use it to pull up another wooden bar which blocks a 
    Open the door and hit a Combine around the corner. Wait for a normal headcrab 
    and a toxic one to come by. Then go around the corner, kill another headcrab, 
    then a Combine at the end of the passage, a Barnacle on the right and a toxic 
    headcrab up the stairs. The suit energy, grenades and health should be worth 
    the additional shooting (note that you have to use the gravity gun in order to 
    get the items).
    Go back and into the trench. There has been a severe battle between Combine 
    and zombies here, so there shouldn't be a lot of opposition here anymore. 
    Follow the trench to the right for a medikit. Afterwards search around for 
    lots of various headcrabs and even a fat zombie. The reward is some supply 
    crates at the end of a hallway. Also look out for a yellow lambda symbol where 
    the fat zombie was; pull in some items in a small hole in the wall.
    Climb up the ladder, defeat another headcrab and climb over the rubble into a 
    big hall. Move up (there is some health on the right behind two barrels), 
    haste over the bridge, use the health and energy panels and snipe at two 
    Combine up ahead above you. Call the platform via the lever and snipe at two 
    more Combine. Once the platform has arrived, push the lever again and quickly 
    board the platform. Turn around to not be surprised by a Combine during your 
    ride. Kill another one on the other side and debark. Shoot a Combine above 
    with the pulse-rifle and/or the SMG, climb up the ladder, snipe at two elite 
    Combine and proceed on the right rail of the platform lift. Shoot another 
    elite Combine above with the pulse-rifle, climb up the ladder at the green 
    tower (this sure took me a while to find...) to the highest level and turn 
    right to quickly kill two white Combine. Hide behind the barrels on the left, 
    pull in an explosive barrel and hurl it down at the two enemies pretty much 
    right in front of you. Climb down the ladder one level, look for good stuff 
    (especially behind the red container) and then drop down to the hopper. Ignore 
    it and go through the door where another hopper awaits you.
    -=-=-=-=-=-=-=-=-=-=-3.12 Chapter 11 - "Follow Freeman!"-=-=-=-=-=-=-=-=-=C11
    Open some supply crates and go outside. Haste along the left wall, hiding from 
    the sniper up ahead whenever possible. Then, once you are next to a truck and 
    a trash bin, run behind another truck, then behind a car and finally rush 
    towards the sniper. Beneath the window you are safe, so take your time and 
    throw up a grenade. Open the supply crates. Carefully go around the corner 
    where another sniper controls the street. Haste across the street into the 
    room with the big windows. Break open a supply crate, leave the room and run 
    on to the right, while strafing and jumping to hopefully avoid some of the 
    sniper attacks. 
    Enter the left building; kill two headcrabs with the gravity gun and a super 
    zombie in the dark area with the shotgun. Enter the bathroom for some medi 
    kits. Head down the ramp and go over to the hurt rebel. Defend him against 
    some zombies with the shotgun. Further down the water corridor are two super 
    zombies. Either use either use the pulse-rifle or the shotgun. It depends on 
    which ammo you can afford to use at the moment.
    Go up the stairs to some zombies you can luckily ignore completely: A sniper 
    on the left takes care of them. Once he's done with them, lob a grenade into 
    the sniper's window. In case you keep missing, there is a grenade crate 
    nearby. Move on to meet Barney, asking you to eliminate two snipers. They 
    aren't visible at the moment, so walk up onto the roof to trigger them. One is 
    at the end of the roof (go down one storey to get him) and your second victim 
    is on the left, attackable from the roof (of course both of them are behind 
    windows again).
    Approach Barney, help him against two toxic headcrabs and follow him down a 
    pile of rubble to a Combine console he manages to hack to open the path to a 
    supply crate and two poisonous headcrabs (gravity gun).
    [Big Bertha]
    Go outside to a small backyard and pull in an explosive barrel from the right. 
    Hurl it up at two Combine and a Sentry Turret. Smash the supply crate and move 
    on to see the true power of the Combine weapon you are aiming to destroy. Go 
    down the stairs, destroy the hopper, use the gravity gun against the Sentry 
    Turret on your left and destroy yet another hopper.
    Outside you will have to tackle the super weapon: A devastating beam comes 
    down at a certain spot every few seconds. This spot is always right at the 
    point you are going to be at when the beam strikes. Since you can see where it 
    will strike next, you can try to dodge it. When you see it in front of you, 
    stop and go back a few feet, as the weapons also has a blast radius. Note that 
    you are safe under a roof or any under solid object. Head for the container 
    near the pit for some health and some cover. Then get back out, turn left and 
    run over the rubble. Somehow you seem to be more safe here than on the street. 
    Head for the door, enter the building and kill two Combine with the pulse-
    After patching yourself up at the health panel, open the next door, wait for 
    the beam to strike again and run outside, heading for the small bunker ahead, 
    which is only lightly guarded. Ignore any other enemies on the right and just 
    proceed ahead to the next building. Two Combine will leave it when you 
    approach it and another one waits inside. Pick up some more stuff and leave on 
    the right. Head for the museum or whatever it is to be safe from the super 
    weapon, but on the other hand you will have to face four normal Combine and an 
    elite Combine. You might want to consider using not only the pulse-rifle but 
    also its secondary fire. Walk past the main entrance, pull a plug behind the 
    force field and enter the museum.
    [A Visit to the Museum]
    Open the left door. See those blue laser lines? These activate sunken Sentry 
    Guns which observe a certain area after having been activated. This one, 
    luckily, is rather harmless. Walk into the laser, step back and you should be 
    fine. Roll a grenade at the Gun while it is up to destroy it. In a small room 
    behind you are infinite grenades and two supply crates.
    The main hall. Hurl a grenade at the Combine appearing behind the force field 
    at the exit sign and finish them off with the pulse-rifle. Then break the blue 
    lasers nearby and destroy the two Sentry Guns. The first one can be struck 
    without entering its area of sight, but for the other one you have to swiftly 
    go around the corner, throw the grenade and retreat. Eliminate two Combine in 
    the dark.
    Go up the stairs, pass by on the lasers and rescue some reinforcements. Then 
    equip a grenade, break the lasers, quickly step around the left corner and 
    toss a grenade into both Guns without them being able to even see you. 
    Afterwards enter the room behind the Guns to find two wall panels and the 
    first shield generator. Use the gravity gun as you did when Alyx lowered the 
    shields on the square. Go back to face lots of Combine and an elite Combine 
    coming up the stairs you already came up from. I highly suggest a well aimed 
    secondary fire of the pulse-rifle.
    Now search for a bridge near the stairs (not the one opposite of it), walk 
    over it, take a right and enter a room you are about to get trapped in. Stay 
    close to the various openings in the walls (patrol along all of them) to get a 
    shot at some Combine behind them. After a while one of the doors is about to 
    be opened. Hit the two hoppers with the gravity gun so they land near that 
    door. Once the door is open, a few more Combine enter the room, getting a 
    taste of their own hopper medicine. Finish them off with the pulse-rifle. Also 
    watch out for the other door which will also be opened (not as obviously, 
    though) by two soldiers. Move on, go through the lasers and do not destroy the 
    guns. Instead bunny-hop towards them and wait in between them for them to 
    cease fire. Then deactivate the generator, which also takes care of the Guns 
    and restock at the health panel.
    Go over to the other wing of the building (either via the bridges or via the 
    main staircase), tell your squad to stay back and break another blue laser. 
    Toss a grenade at the only Sentry Gun and hide behind the table until the 
    grenade explodes. The Gun guarded some grenades and health.
    Now again tell your squad to halt and enter a nearby room with lots of red 
    lasers and a hopper at the entrance. Dispose of the hopper, jump onto the 
    structure right in front of you, walk left past the first few lasers and hop 
    onto the block up ahead. Turn right to jump over the next lasers. Get onto the 
    round thing with the pipes sticking out, walk around it and jump onto the pipe 
    at the wall. Your way leads up the shelf, onto the right shelf and then onto 
    the big solid console nearby. The rest should be self-explaining over the 
    pipes to the switch which turns off the whole security including the hoppers.
    Destroy the last generator which triggers loads of Combine and elite Combine 
    to spawn on the ground floor at the main hall. Throw down a few grenades and 
    kill the survivors with the pulse-rifle. Follow Barney down through the exit 
    passage, destroy three hoppers, use the wall panels and proceed to a Combine 
    console, Barney is about to hack. Enter the newly opened gate, take out a 
    Sentry Turret (gravity gun) and two Combine (pulse-rifle) to clear the way up 
    to the roof.
    [On the Rooftop]
    Simply run along the roofs, killing some Combine with the pulse-rifle (and 
    taking cover, while your men keep fighting) until you reach a health panel and 
    a suit energy panel. As you use these, a gunship takes off. Fire off your 
    first three missiles from where you are at the moment and then head back to 
    the beginning of the roof area. There is a missile crate and luckily the 
    gunship stays rather close here so you can take it down pretty easily.
    Stay near this crate for a while until you see a dropship coming from the 
    right. Hit the strider down below to not get bored as you wait. The dropship 
    drops three Combine and an elite Combine which will open the gate at the 
    panels, rushing towards you. Staying close to the gate is pretty much suicidal 
    on the hard difficulty setting, even if you use the hoppers, but staying near 
    the missile crate allows for a good overview of the situation and the enemy 
    position and it allows for the use of the missile launcher. Just wait for the 
    enemies to come into reach and kill them.
    Move on to near the gate and snipe at an enemy in a guard tower. Move on until 
    you stand behind a container. Pull in the three supply crates, smash them, 
    bunny-hop to the switch near them, activate it and hop back. This lowers the 
    bridge over to a heavily guarded building where infinite enemies keep coming. 
    Fortunately you also have just triggered four rebels to join you. Stay behind 
    the container, waiting for the first three enemies to run over the bridge. 
    After having killed them, get onto the bridge yourself and use the secondary 
    fire of the pulse-rifle to kill three more enemies across the bridge. Now let 
    your squad lead the way and use the secondary fire again upon reaching the 
    other end. There shouldn't be much resistance left and as the Combine stop 
    respawning as soon as you successfully cross the bridge, you can simply clear 
    the rooms in close-quarter battles with the pulse-rifle. Drop down the stairs.
    [War of the Worlds]
    Welcome to the spectacular battle against the striders. Run to the front porch 
    of the museum where some rebels are already fighting against the striders. 
    Fire off your first three missiles and run on into the pit up ahead. Walk 
    through the canal, wait for the second strider to cease firing and quickly run 
    out of the canal and up the rubble. Then take a left into the building where 
    you can nab some missiles. Fire them off, leave the building through where 
    entered it and head for the bunker in the centre of the plaza. Again, pick up 
    some missiles and use them to finish the job.
    Proceed to the big pile of rubble, search for a passage through it and restock 
    at the missile crate. Take down another strider up ahead. Afterwards step back 
    and witness the striders' true power: A new strider coming from the right 
    fires its laser beam at the corner of the building, blowing a hole into it. 
    First destroy the strider then search for a health panel inside. Get back and 
    use the missile launcher against some Combine at a barricade down the street. 
    Go there, walk down the stairs and smash some crates.
    [Big House]
    Briefly step out onto the street to attract a Combine on your right. Retreat 
    and kill him when he's gotten close to you. Then head down the street on the 
    right, escaping into a basement on the left. Pick up the explosive barrel with 
    the gravity gun to hurl it at three Combine coming through the doorway in 
    front of you. Throughout this area new sentry drones appear, but as they can 
    only pester you, first defeat any real enemies or take cover before dealing 
    with them. Walk up the stairs while wielding the shotgun. Lure the two Combine 
    down into the staircase to make the shotgun more effective. Enter the bathroom 
    on the left for two supply crates; then pass up on the ramp to find three more 
    crates. Walk up the ramp, shoot the crossbow at a Combine on the left and run 
    over to the staircase to find some health. Leave the staircase and walk up the 
    concrete bar in the centre of what used to be a room. Hide behind the debris 
    as long as you need to safely run out and over to the next storey of the 
    staircase. There's a missile crate here, but you absolutely don't have to 
    defeat the strider outside. Only do it if you feel like. Anyway, the next step 
    is to hop into the passage next to the crate, smash three supply crates and 
    drop down.
    [Big Battlefield]
    Hop down into the basement, smash a crate on the left and assist your allies 
    in a fight against four Combine with the pulse-rifle. Smash another crate, run 
    up and ignore both the strider and the elite Combine. Drop into the hole on 
    the left and quickly head for the room up ahead where you will find cover and 
    two supply crates. Go around the corner, hide on the right and wait for the 
    second strider to pass by. Drop into the hole the strider came out of and 
    prepare of the three elite Combine to catch up with you. Use the pulse-rifle 
    against them. Break open a supply crate in the dark.
    Move on until the ground below you is blown apart. Look up and use the 
    secondary fire of the pulse-rifle against the right-most Combine. This should 
    also take care of another Combine, only leaving one behind. Kill him, climb 
    up, smash a crate and get outside. Take cover behind the various walls, 
    eliminate some Combine above and run away from any grenades, but don't waste 
    too much time here. Don't try to kill ever enemy; instead go around the 
    corner, pick up some items, lean against the wall to hide from the strider and 
    haste into the closed room nearby. Shoot a Combine with the shotgun and break 
    open a few supply crates.
    Go up, take down a Combine with the shotgun and definitely ignore the goodies 
    nearby. If you get close to them, the strider in the background will fire off 
    its big beam at you. Instead, drop down and keep fighting for a while until 
    the strider opens a new path in front of you. Drop down, hide in the small 
    room on the left where some crates wait to be cracked open and then haste out 
    and up on the left. Kill a few enemies without stopping. Afterwards enter the 
    building, look for some goodies on the left and walk up the stairs to the 
    roof. Defeat another Combine and equip the missile launcher to battle the two 
    striders. But before that, retreat into the staircase until the gunship flies 
    off. Then ignore the Combine on the other roofs, restock at the missile crate, 
    hide in between your attacks and whenever all of your squad members are dead, 
    retreat into the staircase until you have some rebels at your side again, as 
    these draw most of the striders' attention on them. Also don't refrain from 
    patching yourself up at the health panels on the ground level whenever you 
    need to.
    After taking down the two striders, clear the roofs from the Combine, using 
    the missile launcher. Hey, it's fun and you there's a missile crate nearby. 
    Then balance over the girders at the side of the roof where the stairs end. 
    Drop down behind the wall, kill a Combine, pick up some suit energy in a dead 
    end on the left and move on, triggering D0g to appear. While he doesn't defeat 
    the whole opposition, he at least draws the attention to him, giving you the 
    chance to clear the area. Go to the barricade and drop down into the hole, D0g 
    reveals for you.
    -=-=-=-=-=-=-=-=-=-=-=3.13 Chapter 12 - Our Benefactors=-=-=-=-=-=-=-=-=-=C12
    [Outside the Citadel]
    Carefully climb down the cliff on the left, kill a headcrab in the dark (it 
    guards a medkit) and drop down onto the upper pipe. Wait for the machinery in 
    front of you to come up, hop onto it and then quickly to the right. Turn left, 
    move on, drop down a bit, enter the big hall on the right, follow the rail 
    beneath the ceiling and drop down again, this time to the left. Drop down to a 
    small ledge in the hall where the human capsules come through a laser beam. 
    Carefully advance to enter one of those capsules yourself. Press E at the 
    second one you come across, as the first one would get you fried in the laser.
    [A Bumpy Ride]
    Yeah, Monster's Inc...ok, sorry for that. ^^ Look around on your journey to 
    see Combine not wearing suits and masks and also to see some other interesting 
    stuff. You end up in a rather small room, with the hatch opening, making you 
    fall out. Whatever you do, don't commit the same mistake I did once: You can 
    turn around quickly and press E again to stay inside the capsule forever. 
    There is no way out there again, besides loading the last autosave (or some 
    other save file, of course).
    [A New Weapon]
    Sometimes a bug instantly kills you after this area has been loaded 
    completely. If this happens, you have to load a save file from the last area 
    and hope for the bug to not appear again.
    Anyway, you are taken away all your weapons (hey, didn't this already happen 
    in HL1?), but the machine somehow can't handle the gravity gun, which is 
    turned into a super gravity gun in the process. Wait for four Combine to storm 
    the room. This is the perfect chance to try out the new gun. How? There are no 
    loose objects around here? Well, simply aim at the enemies directly and either 
    pull them in or hurl them away. Furthermore the new gravity gun is able to 
    heave heavy objects like the computers found all around the Citadel.
    Restock at the wall panel (from now on those panels both give health and suit 
    energy; the latter one even up to 200). Rip out a monitor, move on and hurl it 
    at the Combine in front of you. Quickly proceed as new Combine keep spawning. 
    Pull them in briefly and drop them to be able to pull in another one. If you 
    and the enemies build a straight line, then pull in the first enemy and toss 
    him at his companions. Hop over the railing and hurl the two Combine into the 
    light pole to see its devastating effect on any living being...which includes 
    you as well, so watch out not to get too close to it.
    Go along the right, kill a lone Combine and ride up the lift. Pull in the 
    left-most energy ball both to turn off the force field and to have a powerful 
    weapon at your disposal: Toss the ball at the elite Combine and then pull in 
    another energy ball to also dispose of the normal Combine. Patch yourself up 
    at the wall panel.
    Shut down another force-field, kill numerous Combine and keep up the pressure 
    on them as they keep spawning. Swiftly move on to stop the spawning. Use 
    another wall panel and leave this area.
    [A sloooooow Lift]
    Easily dispose of two Combine. Then head for the open hall, press the switch 
    and run to the wall panel. Defend yourself against hordes of scanners, 
    manhacks, Combine and elite Combine coming from various directions. Ignore the 
    computer and the energy balls. All it takes here is a straight forward attack 
    against the enemies and some healing whenever possible.
    After a while the lift in the centre of the hall will reach your level, so 
    grab a computer panel via gravity gun (thanks to Taner Tuemkaya for the hint) 
    and step onto the lift to be taken up automatically. This is one of the most 
    difficult passage of the game and it can get really tedious on hard, but 
    unfortunately there isn't a lot to tell you about it if you haven't grabbed a 
    panel to use as a shield. Keep moving, look up to see where enemies might 
    stand and hurl energy balls at them. Whenever you are close enough to an 
    enemy, try to pull him in directly instead of using the plasma balls.
    Once you're finally up, you definitely deserve the health panel. Stop before 
    the force field on the left to wait for a few Combine running into your arms. 
    Move out into another high hall and haste through as you eliminate a few small 
    groups of Combine. Use the health panel.
    Drop down and quickly pull in the capsule on the left. Use it to safely reach 
    the second capsule, hurl the first one at the Combine in front of you, pick up 
    the second one and also hurl it at the enemies after reaching capsule #3. As 
    you are extremely close to the Combine now and as there should only be a few 
    of them left you can attack them directly. Run on, pick up another capsule and 
    shoot it at the other Combine across the bridge. Hide behind the capsules on 
    the left, wait for any survivors to come near and dispose of them.
    Not it's time to fight a strider with the super gravity gun. Stay behind the 
    capsules, pull in an energy ball, peek out on the left and fire at the 
    strider. Hide again and repeat. If your cover gets blown apart somehow, 
    constantly strafe from the left set of capsules to the right one and back 
    again while rapidly shooting off energy balls. Lower the force field at the 
    other end of the bridge after the battle and hop down.
    [Another Bumpy Ride]
    Heal yourself and enter another capsule. A laser scanner unfortunately 
    recognizes you, forcing you to take another path than the other capsules. See 
    those big frog-like things below you at one place during the ride? I wonder if 
    those appear in Episode 1 or any later episode.
    -=-=-=-=-=-=-=-=-=-=-=-=3.14 Chapter 13 - Dark Energy=-=-=-=-=-=-=-=-=-=-=C13
    [The Portal]
    After the long and interesting dialogue you have to follow Dr. Breen. See that 
    thing he speaks with? I guess that has to be some sort of Combine Queen or 
    something like that. Shortly after you get back your super gravity gun and 
    Alyx enables you to enter the lift your nemesis escaped with.
    Listen to some more text; then move along the wall on the right, kill three 
    Combine and move up the ramp until you can pull in the six energy balls of the 
    first two force fields. Proceed to third one. As you shut it down you should 
    ignore the enemies coming up from behind. Hop onto the thing that goes up and 
    down and let it take you up to some enemies. Kill them and move on to a small 
    platform at the inner circle. It takes you up to near a health panel. Jump 
    towards it, patch yourself up, ignore the enemies below and hop onto another 
    platform near the panel. Just watch out not to fall down. Ride the platform 
    up, close in on three enemies, kill them, turn left and take one last platform 
    up to the final battle.
    Position yourself at the far end of the platform. Two gunships will come in 
    through the portal. Since there are two streams of energy balls around you 
    will have to use these to crash the gunships. Stay at the far end, pull in 
    energy balls, fire them off at the left enemy (luckily, they don't zoom around 
    as they usually do) and strafe around a bit to hide behind the column in 
    between your attacks. Once the first one is down, strafe to the right to 
    repeat the procedure against the second gunship.
    After that, return to the far left of the platform and hurl plasma balls into 
    the portal core to break off those spinning plates.
    That's it! You've just beaten HL2. Congratulations.
                                      4. Weapons                              DDD
    Primary Fire Mode  : Swing the crowbar for 10 points of damage.
    Secondary Fire Mode: n/a
    Ah, the famous crowbar; one of your most reliable aids in the original Half-
    Life. Unfortunately, though, it loses almost all of his purposes once you get 
    the gravity gun. Before that, use the crowbar to break crates apart, to 
    destroy manhacks and to fight headcrabs when trying to save ammo. Afterwards 
    you can at least still use it against normal zombies and toxic zombies unless 
    there are objects lying around you can toss at them with the gravity gun. Oh, 
    and also don't use the crowbar against Barnacles as you could do in HL1.
    Gravity Gun:
    Primary Fire Mode  : Toss something away.
    Secondary Fire Mode: Pull something to you and make it float in midair right  
                         in front of the gun.
    Probably the best idea Valve had: The gravity gun can be extremely fun to use 
    and it allows for a lot of experimenting. Use the gravity gun to destroy 
    crates, to defeat manhacks, antlions and any kind of headcrabs (by attacking 
    them directly), as well as against antlion queens, normal zombies and toxic 
    zombies when there are heavy solid objects lying around.
    Furthermore it can perfectly toss away those pesky sentry guns and mine balls 
    and in combination with concrete blocks, explosive barrels and radiators it 
    even is a great weapon against the Combine as long as you know how to aim.
    Explosive objects that are thrown away with the gravity gun explode on 
    landing, so this can both be a great danger to any enemy and to you, so makes 
    sure to only do this when there is a lot of space around you and when the 
    enemy is quite far away.
    Also employ the gravity gun to pull in items that would be out of reach 
    While you can use the gravity gun to pick up grenades and throw them away, I 
    really don't recommend this as they might explode right in your face this way. 
    Only try this in multiplayer when it's a make or break situation.
    Primary Fire Mode  : Normal Shot for 5 points of damage.
    Secondary Fire Mode: Multiple bullets.
    The standard pistol works well against headcrabs before obtaining the gravity 
    gun, but after that it should only be used against single normal zombies. 
    Unlike other Ego-Shooters, Half-Life 2 has a pretty lame pistol and you 
    definitely shouldn't use it except for the two situations I mentioned above.
    Time to update this, as Jamie Goodwin was kind enough to point me to The Steel 
    Phantom's guide that mentions the pistol's secondary fire mode. First, press 
    and hold the alternative fire button, then also press and hold the standard 
    one for a while. Now after releasing the secondary fire button you will send 
    out up to 10 bullets at the same time in one concentrated shot, dealing quite 
    some damage. Since it takes some time to load, this is still worse than using 
    the later weapons, but if you don't have anything else and need to strike hard 
    and quick on a single enemy, this is the way to go.
    Primary Fire Mode  : Normal Shot for staggering 40 points of damage.
    Secondary Fire Mode: n/a
    The magnum kicks ass in any game it appears in and so does it in Half-Life 2. 
    It is somewhat slow, its reload time is a pain and its ammo is rare, but it 
    sure hits hard and accurate. Use it when you need to take out any kind of 
    (non-mechanical) enemy quickly or when you just feel like going rampage.
    Sub Machine Gun:
    Primary Fire Mode  : Rapid Fire for mere 4 points of damage.
    Secondary Fire Mode: Grenade for 100 points of damage.
    This gun used to be my weapon of choice in the first Half-Life. Unfortunately 
    it is way less effective in the second one. The normal fire is decent, but a 
    magazine is a lot earlier empty already than you'd expect, it is imprecise and 
    it doesn't deal as much damage as it should. The grenades on the other hand 
    are great as they are powerful and as they explode immediately upon contact. 
    Still the grenades on their own don't make a good weapon and switching to the 
    SMG just to fire off a grenade also isn't a good thing to do. Bottom-line is: 
    Use the SMG when you are low on pulse-rifle ammo and on shotgun ammo or when 
    you have lots of health left and not too many enemies around.
    Primary Fire Mode  : Rapid Fire for 8 points of damage.
    Secondary Fire Mode: Disintegrator
    Best. Weapon. Of the game.
    Seriously, the pulse-rifle has a high rate of fire, it is pretty precise even 
    at long distances, it is extremely powerful and after about half of the game 
    you will be able to loot a lot of ammo for it. Furthermore the secondary fire 
    is a feast to use as well. You fire off a big ball of plasma energy which 
    bounces off any walls a few times, instantly killing any living enemy upon 
    contact. Since its ammo is scarce, though, you should conserve it for really 
    hard passages. Another (minor) downside is that the secondary fire not only 
    dissolves the enemies, but also their weapons.
    Use the pulse-rifle against Combine and elite Combine and also on super 
    zombies if you feel like you need to. It can even be used to snipe at enemies 
    if you run low on crossbow ammo. Just don't waste the pulse energy which 
    especially means not to use it against weak enemies and to aim for the 
    Combine's heads. The secondary fire can also be used against Striders in case 
    you run out of RPGs.
    Primary Fire Mode  : Single Shot for 8 points of damage for each shrapnel.
    Secondary Fire Mode: Double Shot for 8 points of damage for each shrapnel.
    Well, it's a shotgun. I guess you know what that means: Great damage in close 
    quarter, but extreme scattering at long distances. The shotgun is of good use 
    against any kinds of zombies and headcrabs, but should also be used against 
    Combine inside of buildings to save the pulse ammo. The secondary fire 
    basically is the same as the primary one, differing in that it takes two 
    shells and hence dealing twice the damage. If you are confident in your aiming 
    skills, I recommend the double shot against Combine, as it would otherwise 
    usually take two hits ion hard difficulty to kill a Combine.
    Primary Fire Mode  : Single Shot for 100 points of damage.
    Secondary Fire Mode: Zoom in / zoom out
    Other Ego-Shooters might have sniping weapons that are both more effective and 
    cooler, but at least you have a sniping weapon after all. Zoom in at an enemy 
    (never even think of fighting enemies up close with the crossbow) and fire off 
    a slow bolt. Not only are they slow but they also are bound to gravity, which 
    means that they lose height as they fly. Furthermore the crossbow bolts often 
    don't hit, somehow disappearing in midair for no obvious reason. Still, since 
    it is a one-hit-kill weapon and since it has a great zoom, this should be your 
    first choice against Combine standing far away, at least as long as they don't 
    move around too much. If the Combine are at medium distance or if they keep 
    dodging your attacks, I rather recommend the pulse-rifle.
    Primary Fire Mode  : Press to lob a grenade or keep pressed until you want to 
                         lob it. Deals 150 points of damage.
    Secondary Fire Mode: Light throw also for 150 points of damage.
    Grenades either explode a few seconds after having been thrown (no matter how 
    long you kept in your hand) or upon contact with anything, when being picked 
    up with the gravity gun and hurled away.
    Sadly the latter choice is too risky and the first one is rather useless in 
    most situations as fast enemies that try to rush in on you are too hard to hit 
    and as Combine most often run away from the grenades. Only throw grenades to 
    clear a stationary machine gun or against numerous enemies in tight places.
    Secondary fire makes Gordon rather drop the grenade than really toss it, so 
    use it to attack close targets, but make sure to run from the explosion.
    Missile Launcher:
    Primary Fire Mode  : Fire off a missile for 150 points of damage. 
    Secondary Fire Mode: n/a
    The missile launcher is an extremely strong weapon, just as it is supposed to 
    be. Like in HL1 you can steer a missile after having fired it off, making it 
    easier to hit moving targets. The bad thing, though is that it actually isn't 
    a can, but rather a must. Unlike HL1, HL2 doesn't allow for turning off the 
    steering function, so you cannot fire and forget. Its most important use is 
    against gunships, which require the steering function, but still I feel like 
    they shouldn't have changed the weapon in the second game.
    The missile launcher is crucial against gunships and striders, but it should 
    also be used against strong groups of Combine. Don't worry: If you definitely 
    need the missile launcher to proceed you will always have a missile crate 
    somewhere not too far away.
    Also note that the blast radius isn't as effective as you might think. In 
    order to kill a Combine you have to hit him directly or the 
    ground/wall/ceiling extremely close to him.
    Primary Fire Mode  : Toss a Bug Bait to determine a target for the antlions. 
    Secondary Fire Mode: Squeeze a Bug Bait to make all antlions follow you.
    The pheropods grant you control over all antlions (except for the big ones) 
    even if you don't have 'em in your hands. Still you should use them for most 
    of the time when antlions are around as they are not only fun to use, but also 
    pretty effective when commanding the insects to charge in before you. After 
    leaving Nova Prospekt, however, the pheropods become rather useless, since you 
    leave your insect friends behind. The only remaining use for them is to 
    distract Combine by throwing the pheropods right at them. Only do this if you 
    need to kill a Combine desperately without risking to lose any health and also 
    only if that Combine has no company around, though.
    Super Gravity Gun:
    Primary Fire Mode  : Toss something away.
    Secondary Fire Mode: Pull something to you and make it float in midair right  
                         in front of the gun.
    Ok, actually this isn't listed as a weapon on its own in the game, but I fell 
    like the enhanced gravity gun deserves its own section.
    Basically the super gravity gun works the same way as the normal gravity gun, 
    but it wields so much more power than its little brother. It allows for 
    manipulating Combine, plasma balls, heavy computers and monitors and, of 
    course, all the stuff the normal gravity gun can.
    Since it is your only weapon once you get it, you surely have to use it, but 
    let me give you the advice to mainly use the gun on the enemies directly. 
    Hurling heavy objects takes too long and you don't have a clear view. Plasma 
    balls also take a while and they are rather hard to aim with. Pulling in an 
    enemy directly takes him down quickly and you can hurl it at its buddies. 
    Alternatively, when fighting Combine over a big distance, you can pull in the 
    first one, drop him while he flies over to you and quickly lift the second one 
    and so on.
                                      5. Enemies                              EEE
    In this section, the first field for every enemy holds its name (or what I 
    believe to be its name), the second one holds my opinion on how dangerous they 
    are (from 1 to 5 asterisks, with five being extremely lethal) and the third 
    one holds its outer appearance.
    Please keep in mind that humanoid enemies receive three times the damage when 
    being hit in the head, whereas the three types of zombies only get double the 
    damage. These numbers only apply for the easy difficulty setting, but on 
    normal and hard enemies obviously still receive more damage from headshots and 
    they still are more effective against Combines.
    -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-5.1 Combine-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=EE1
    |Combine Soldier |   ***OO   | Humanoid alien wearing a blue suit and a mask|
    |Weapon of choice against it:| 1. Pulse-rifle | 2. Shotgun / Crossbow       |
    |The common Combine Soldier probably is the enemy you will encounter the    |
    |most. They either wield a shotgun, an SMG or a pulse-rifle, all of which   |
    |are rather strong weapons. Furthermore they can toss grenades, smack you   | 
    |with their gun I close-quarter and man machine guns. They also dodge your  | 
    |grenades and sometimes hide behind objects. Definitely kill them quickly,  | 
    |especially when being close to them as a shotgun can rip you apart in no   | 
    |time.                                                                      |
    |Elite Combine   |***OO + 1/2| Humanoid alien wearing a white suit          |
    |Weapon of choice against it:| 1. Pulse-rifle | 2. Shotgun / Crossbow       |
    |These are pretty similar to the usual Combine Soldiers, but they always    | 
    |carry a pulse-rifle, even employing its secondary fire mode. In addition   | 
    |they can take a bit more of damage than the blue Combine. On the other hand| 
    |their pulse-rifle obviously does the same damage as the one of the normal  | 
    |Combine and the white guys cannot throw grenades. Bottom-line is that they | 
    |are a bit more dangerous than their blue buddies, making them your first   | 
    |target whenever you see one of them.                                       |
    -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=5.2 Xen Aliens=-=-=-=-=-=-=-=-=-=-=-=-=-=-EE2
    |Headcrab        |   *OOOO   | Little alien trying to jump at you           |
    |Weapon of choice against it:| 1. Gravity Gun | 2. Pistol / Shotgun         |
    |I guess you know these pesky little creatures from HL1 or from the Alien   | 
    |movies. Although they tend to be tedious as they can be hard to hit, they  | 
    |are only a minimum threat as they deal few damage. Early in the game you   | 
    |should use the crowbar, later on the gravity gun. If you want to get them  | 
    |out of the way quickly you can also use the pistol or the shotgun.         |
    |Toxic Headcrab  |   *OOOO   | Similar to headcrabs, but thinner and black  |
    |Weapon of choice against it:| 1. Gravity Gun | 2. Pistol / Shotgun         |
    |Like the normal headcrabs, these try to assault you with a long jump, but  | 
    |they don't deal damage the usual way. Instead they lower your health to one| 
    |point as they poison you. Your health slowly restores to nearly the amount | 
    |it was at before the attack, so toxic headcrabs on their own can only take | 
    |away a bit of your life, but in combination with other enemies, they can   | 
    |mean a quick death. If these appear together with other headcrabs, you     | 
    |should use the shotgun, otherwise there is no need to worry.               |
    |Super Headcrab  |*OOOO + 1/2| Similar to headcrabs, but thinner            |
    |Weapon of choice against it:| 1. Gravity Gun | 2. Pistol / Shotgun         |
    |Probably Valve had some other name in mind for these, but I think super    | 
    |headcrab gives you a good idea of what they are: Better headcrabs. They are| 
    |a lot faster than the normal type, but that's about it. Because of their   | 
    |speed they also do more damage in a short amount of time, but still they   | 
    |aren't too much of a threat.                                               |
    |Zombie          |   *OOOO   | Mutated human with a headcrab on its head    |
    |Weapon of choice against it:| 1. Gravity Gun | 2. Crowbar / Shotgun        |
    |Zombies are human beings that have been overtaken by a headcrab. They are  | 
    |dumb, they move rather slowly, they only attack in close-quarter and       |
    |they're dead after a few hits. Unless you're trapped, hurl objects at them | 
    |with the gravity gun or use the crowbar, but if you lack space to dodge    | 
    |their pretty strong attacks, just give them a blast from your shotgun.     | 
    |If you don't hit them in the head or if the final blast to the head was too| 
    |weak (read: no more than 10HP of damage) to kill the headcrab as well, the | 
    |pesky parasite will still go after you have killed its host (thanks to     | 
    |hacksign5 for pointing out the damage issue).                              |
    |Toxic Zombie    |   *OOOO   | Fat human with a toxic headcrab on it        |
    |Weapon of choice against it:| 1. Gravity Gun | 2. Crowbar / Shotgun        |
    |These bulky (or even fat) guys have been overtaken by toxic headcrabs,     |
    |three of which they hurl at you. Just kill those three headcrabs and either| 
    |ignore the host or take him down with the crowbar which takes a while      |
    |seeing as they have three times as much HP as standard zombies.            |
    |Super Zombie    |   ****O   | Human with a super headcrab on its head      |
    |Weapon of choice against it:| 1. Shotgun     | 2. Pulse-rifle              |
    |Super zombies are heavily mutated human beings that have been infected by a| 
    |super headcrab. Other than the normal and toxic zombies, these are         |
    |extremely fast and dangerous. Try to strafe and back off all the time while| 
    |aiming the shotgun at their head. Like the normal zombies, the super       |
    |zombies sometimes give you a second fight as the parasite can survive.     |
    |Barnacle        |OOOOO + 1/2| An alien creature hanging from the ceiling   |
    |Weapon of choice against it:| 1. Pistol      | 2. Shotgun                  |
    |Ahh, the lovely Barnacles get a comeback. Simply avoid walking into their  | 
    |tentacle and you should be fine. If you cannot easily get around it, either| 
    |kill them from below or feed them some object that lies around to quickly  | 
    |pass by. If you still get caught by one, swiftly eliminate it on your way  |
    |up or else you will not only get hurt by the Barnacle directly, but also by| 
    |the fall.                                                                  |
    -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-5.3 Bugs-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-EE3
    |Antlion         |*OOOO + 1/2| A big insect                                 |
    |Weapon of choice against it:| 1. Gravity Gun | 2. Shotgun / SMG            |
    |These insects behave similar to headcrabs, but they keep respawning in the | 
    |sand and they deal more damage. Stay in your buggy as long as possible and | 
    |stay off the sand. Those machineries that look like oil pumps can hold them| 
    |off when being activated. Once you've got the pheropods, the antlions stop | 
    |attacking you.                                                             |
    |Antlion Queen   |   ****O   | An even bigger insect                        |
    |Weapon of choice against it:| 1. Shotgun     | 2. Gravity Gun / Pulse-Rifle|
    |Luckily you encounter these huge antlions only a few times. When you do,   | 
    |keep running from them backwards and try to get solid obstacles between you| 
    |and it. Antlion Queens usually try to tackle you, but they can also hurl   | 
    |loose objects at you, so keep strafing when one of them aims for a radiator| 
    |or a crate or whatever.                                                    |
    -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=5.4 Heavy Gear=-=-=-=-=-=-=-=-=-=-=-=-=-=-EE4
    |Helicopter      |   ****O   | Well...it's a helicopter                     |
    |Weapon of choice against it:| 1. Machine Gun | 2. None                     |
    |These appear only at the beginning of the game. Later on they are          | 
    |substituted by the gunships. As you don't have the missile launcher when   | 
    |facing the helicopters, try to avoid their heavy fire, hide and move       |
    |quickly. The only way of destroying them is with stationary machine guns   |
    |and with the one you get attached to your hovercraft.                      |
    |Dropship        |   ***OO   | An insectoid flying machine with a black box |
    |Weapon of choice against it:| 1. None        | 2. None                     |
    |Dropships cannot be taken down (except for one scene where it is absolutely| 
    |trivial), but they have a machine gun at their front side and they carry   | 
    |four Combine, that they drop out right at the machine gun. Try not to get  | 
    |into the view of the machine gun; the best position is next to them, so you| 
    |are safe and can easily kill the Combine while disembarking. Otherwise,    |
    |stay away from them and wait until they are gone.                          |
    |Gunship         |   *****   | Similar to dropships, but thinner and w/o box|
    |Weapon of choice against it:| 1. Missile L.  | 2. None                     |
    |Gunships are the hardest enemies in HL2 in my opinion. Not only do they    |
    |deal lots of damage, but they also withstand a lot of damage and they can  | 
    |blow up your missiles in midair. Since the missile launcher is the only way| 
    |to take them down you still have to use them. Step out of your hideout,    |
    |fire a missile rather far away from the gunship and steer it in, in a      |
    |zigzag motion. Another good way of dealing with a gunship is to wait for it| 
    |to get close and/or to turn around, so you get to aim at it directly.      |
    |Strider         |   ****O   | Three-legged walkers                         |
    |Weapon of choice against it:| 1. Missile L.  | 2. Pulse-Rifle second. fire |
    |Imagine the walkers from War of the Worlds and put in some insectoid looks | 
    |and you know what you have here. Striders are powerful and they take a lot | 
    |of damage before going down. Luckily, though, you will only face few of    |
    |them and most of the time you will have a missile crate and allies nearby. | 
    |This means you get to hide, shoot, hide and so on, with your buddies even  | 
    |distracting the Strider, further easing the fight for you.                 |
    -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=5.5 Small Machines=-=-=-=-=-=-=-=-=-=-=-=-=-EE5
    |Hopper          |   *OOOO   | A mine with a light on top of it             |
    |Weapon of choice against it:| 1. Gravity Gun | 2. None                     |
    |Hoppers first of all indicate if they mean any danger: If the light is     | 
    |turned off, they don't do anything, allowing you to use the gravity gun on | 
    |them, so they get a green light. When the light is green, they explode if  |
    |an enemy closes in. If the light is red, they react on Gordon and his      |
    |allies. Either ignore hoppers or carefully approach them, backing off, once| 
    |they hop up, or use the gravity gun to pick them up, which also allows you | 
    |to hurl them at enemies. Hoppers are sometimes dropped by small            |
    |transporters. Simply ignore those.                                         |
    |Sentry Drone    |   OOOOO   | A flying camera                              |
    |Weapon of choice against it:| 1. Gravity Gun | 2. Crowbar                  |
    |Scanners cannot hurt you. In fact the only thing they can do is annoying   |
    |you with their flash light. Destroy them when you aren't amidst a real     | 
    |battle.                                                                    |
    |Laser Ball      |   *OOOO   | A Metal ball with blue laser light           |
    |Weapon of choice against it:| 1. Gravity Gun | 2. None                     |
    |They try to get close to deal some damage, but as they are weak, you don't | 
    |have to worry too much. Pull them in with the gravity gun and throw them   | 
    |down a cliff or into the water.                                            |
    |Sentry Turret   |   ***OO   | A small turret that fires automatically      |
    |Weapon of choice against it:| 1. Gravity Gun | 2. Shotgun                  |
    |Sentry Turrets hit hard and they cannot really be destroyed. Hide from them| 
    |and either hurl objects at them or close in to use the gravity gun directly| 
    |to knock them over.                                                        |
    |Sunken Gun      |   ***OO   | A sunken gun, that pops out of the ground    |
    |Weapon of choice against it:| 1. Grenades    | 2. None                     |
    |When you see a blue laser line, first of all search for differently colored| 
    |metal plates on the ground. This is where the sunken guns pop out once you | 
    |cross the line. Equip a grenade, hold the primary fire button, aim at the  | 
    |plate and break the laser. Once you do, instantly release the button and   | 
    |hide somewhere. Hopefully the grenade rolls right into the hatch of the    |
    |gun, destroying it in a single blow. If it misses: Repeat.                 |
    |Manhack         |   **OOO   | A small mechanic flying thing with saw blades|
    |Weapon of choice against it:| 1. Gravity Gun | 2. Crowbar                  |
    |Actually manhacks are a big threat early on in the game, requiring you to  | 
    |dodge well and swing the crowbar with skill, but once you get the gravity  | 
    |gun, they become nothing but a little annoyance. Simply hurl them against  | 
    |the walls with it and they will explode on the first hit when being close  |
    |to the wall. Otherwise you might also use the SMG before getting the       |
    |gravity gun.                                                               |
                                 6. Closing Comments                          FFF
    Probably lots of people disagree with me on this, but I was kinda disappointed 
    by HL2. Half-Life 1 basically had it all (plus those stupid Xen-levels), 
    whereas I really didn't get the same feeling carried over by the atmosphere in 
    HL2 as I did in its predecessor. I missed the cool setting in Black Mesa, I 
    missed the aliens, I missed the great weapons and I certainly hated the 
    puzzles in HL2; one of the strong points of HL1. I mean: Come on, stepping 
    onto a crate, dropping another one in front of you, stepping onto it, turning 
    around, picking up the first crate, dropping it in front of you and so on 
    isn't fun once and this game requires stuff like that various times. What 
    could've been...hopefully Dark Messiah of Might & Magic makes better use of 
    the potentially great Source Engine.
    Oh and I haven't mentioned the final boss and the ending so far: HL1 had one 
    of the most intricate Ego-Shooter bosses in a world where the highest trouble 
    makers in games like RTCW, Duke Nukem 3D, Goldeneye, Painkiller and so on 
    disappoint in terms of creativity and difficulty, but in HL2 you can stand 
    still at a place and keep firing to beat the final boss. That's just plain bad 
    game design, directly leading to the ending: You might think differently on 
    this, but I thought the ending of HL1 was cool (with the decision-making part 
    and the teleportation) and made me long for a sequel, whereas the ending of 
    HL2 just made me mad. I don't want to spoil you (maybe you read this part 
    prior to finishing the game, although I doubt anybody reads this section at 
    all ^^), so I won't say anything more about it, although there actually isn't 
    much to spoil about it.
    Still HL2 is a good game and I enjoyed it. The gravity gun was a great, yet 
    not fully taken advantage of, weapon, the graphics are still stunning at times 
    and there's lots of variance in gameplay...so please don't email me how much 
    of a moron I am for criticizing "teh Uber-Shooter!!1!eleven". ;)
    I'd appreciate any comments, questions, high scores, critics or whatsoever, so 
    please mail me at KeeperBvK@web.de if you have anything to tell me (even 
    misspellings and stuff).
                                  7. Version History                          GGG
    Started working on this on May 30, 2006.
    1.0:  06/18/2006, 179 KB large
    1.01: 06/22/2006, 179 KB large: Added www.supercheats.com
    1.02: 07/09/2996, 179 KB large:
    - Improved on the museum section of the walkthrough.
    - Added the secondary fire of the Pulse-Rifle as an alternative way to 
    destroying the Striders, thanks to Bruce Zhang.
    1.03: 07/26/2006, 180 KB large: Changed Dog to D0g. Thx to Robbie Vancourt.
    1.04: 10/27/2006, 180 KB large: Walker Wilson told me that the pheropods can  
    				 also be used to distract Combines, so I added 
    1.05: 01/18/2007, 180 KB large: Added the secondary fire for grenades, thx to 
    1.06: 02/17/2007, 180 KB large: Added www.dlh.net and www.mogelgott.de
    1.07: 03/12/2007, 181 KB large: Added www.honestgamers.com.
    1.08: 08/07/2007, 181 KB large: Minor tweaking and a better strategy against 
      Hoppers added.
    1.09: 09/30/2007, 182 KB large: Added a great new way of beating the siege 
      part in Entanglement. Thanks to Vidmo for  
    1.10: 12/17/2007, 182 KB large: Added www.xboxevolved.com.
    1.11: 01/23/2008, 183 KB large: Added a tiny bit to the description of the 
             Magnum. Thanks to Andrew Carts.
    1.12: 01/24/2008, 183 KB large: Added www.gamesradar.com and  
    1.13: 01/28/2008, 184 KB large: Added a new strategy in Entanglement, thanks 
             to MeestahChanggg & Darkpark.
    1.14: 01/29/2008, 184 KB large: Added www.cheathappens.com.
    1.15: 02/05/2008, 184 KB large: Added www.trainerscity.com
    1.16: 02/07/2008, 185 KB large: Added an easteregg in chapter 4 and a hint in 
    				 chapter 12, thanks to Warlock1307 and Taner 
    1.17: 03/31/2008, 185 KB large: Added www.psxextreme.com
    1.20: 04/09/2010, 188 KB large: Finally a bigger update after that much time 
    since the last update whatsoever. It's amazing how HL 2 still offers great new 
    tricks and secrets. I begin to like the game, actually. ;)
    - fixed some typos, did some rephrasing.
    - Added a strategy in Highway 17, thanks to Bacenator96.
    - Added the pistol's secondary mode of fire.
    - Added a great trick concerning D0g's ball, thanks to tdaranouvong.
    - Added a secret in Sandtrap, thanks to AparoidX.
    - Added a lot about damage info for enemies and weapons, thanks to hacksign5.
    1.21: 05/26/2010, 188 KB large: Added 2 hints in chapter 4, thanks to Mikoro.
    1.22: 02/08/2012, 188 KB large: Added halflife2.net, removed the Experimental  
                     section and moved the version history to the end of the file
                                      8. Credits                              HHH
    Thx go out to:
    O Bruce Zhang, for pointing out that the secondary fire of the Pulse-Rifle 
      also hurts Striders.
    O Robbie Vancourt, for telling me that Alyx' robot pet's name isn't Dog but 
    O Walker Wilson, for sending in some good info on the pheropods.
    O Dominic_rules, for informing me that grenades also have a secondary fire 
    O Vidmo, for hinting me to building a set of stairs in Entanglement, making  
      that level drastically easier.
    O Andrew Carts, for hinting me at mentioning that the Magnum is not only 
      strong, but also pretty accurate. Seems obvious, but I missed out on that 
      before he told me. ;)
    O MeestahChanggg & Darkpark, for refining Vidmo's great strategy even more.
    O Warlock1307, for pointing me to the singing Vortigaunt.
    O Taner Tuemkaya, for giving me a neat hint on the end of level 12.
    O Baconator96, for a neat advice near the end of Highway 17.
    O tdaranouvong, for the ball-trick in chapter 5.
    O AparoidX for the sink-secret in Sandtraps.
    O hacksign5 for a lot of info on damage.
    O mikoro for two strategies in chapter 4.

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