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    FAQ/Walkthrough by SBolle

    Version: 1.11 | Updated: 06/03/00 | Search Guide | Bookmark Guide

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                         Guide\Walkthrough Version 1.11
    
    
                       ___________________________________                     
                       written by Stijn Bolle (03-06-2000)
                       e-mail: ravager@pandora.be
                       ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
    
    ________
    Contents
    ŻŻŻŻŻŻŻŻ
    
      1 Updates
      2 Introduction
      3 Walkthrough
        3.1 Welcome to Black Mesa
        3.2 We're pulling out
        3.3 Missing in Action
        3.4 Friendly Fire
        3.5 We're no alone
        3.6 Crush Depth
        3.7 Vicarious Reality
        3.8 Pit Worm's nest
        3.9 Foxtrot Uniform
        3.10 The Package
        3.11 Worlds collide
        3.12 The end
      4 New monsters
      5 Cheats & Tricks
        5.1 Easter eggs
        5.2 Cheats
        5.3 Xen Locations
      6 Links, Greets & Questions
      7 Author
      8 Legal Notice
    
    
    
    _________
    I Updates
    ŻŻŻŻŻŻŻŻŻ
    
      *** Version 1.11 (3-06-00)
    
       - Chris Compton submitted a small glitch I added to the easter eggs
         section.
    
    
      *** Version 1.1 (24-03-2000)
    
       - Every time I think the guide is finally completed and all the secrets
         have been revealed, there's abother great easter egg found, now with
         a referral to James Bond, courtesy of Adam 1.
    
    
      *** Version 1.09 (30-03-2000)
    
       - Another nice easter\egg trick added. Now you play all the originl Half
         Life levels with the Opposing Force weapons. 
    
    
      *** Version 1.08 (26-03-2000)
    
       - Some minor changes and corrected glitches.
    
    
      *** Version 1.07 (9-03-2000)
    
       - An easter egg has been updated
    
    
     *** Version 1.06 (8-03-2000)
    
       - Some changes have been made to the walkthrough
    
       - A neat trick has been added by Crash Easton
    
       - This guide has been chosen as the cheatmaster's choice at the avault
         games site (www.avault.com/cheats). [March 5th 2000]
    
    
     *** Version 1.05 (7-03-2000)
    
        - I added four more easter eggs to the easter egg section (I'm pretty
          sure no-one else found them, so they're worth checking out). I
          almost can start write a Half Life: opposing force easter egg guide,
          which means they have a good sense of humour at Gearbox.
    
    
     *** Version 1.04 (6-03-2000)
    
        - A smaller update this time, but I'll update the guide as soon as I
          have some new information now, because I lose it otherwise :)
    
        - There's a new easter egg available.
    
        - A new Xen location has been added
    
    
     *** Version 1.03 (5-03-2000)
    
        - A dutch version of my walkthrough is available for download, you can
          download it from www.gamefaqs.com
    
        - My contact information has changed, so if you want to mail me, make
          sure you use my new mail address.
    
        - A LOT of new easter eggs have been added. On the last update, I
          thought I had found them all ... but I was very strong, there are a
          lot of things that still were hidden, check out the easter eggs
          section (5.1)
    
        - The cheatcodes (5.2) have been updated
    
        - Various changes have been made
    
    
    
    
     *** Version 1.02 (4-02-2000)
    
        - A new section has been added: Xen Locations (5.3), on different places
          in the game, it's possible to warp to Xen by using your displacer. I
          think I've found all places, but you can mail me new ones if you found
          any.
    
        - I added some more easter eggs to the easter egg section (5.2)
    
        - The cheat codes (5.1) have been updated
    
    
     *** Version 1.01 (31-12-99)
    
        - The cheats have been updated
        - Another easter egg has been added
        - Some parts of the walkthrough have been modified
    
    
     *** Version 1.0 (27-12-99)
    
       - This is the first version of this file. Everything has been added. I
         don't expect to add much more, but if you have some interesting
         information to add, don't hesitate to mail me.
    
    
    
    _______________
    II Introduction
    ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
      
      Half-Life: Opposing Force is an official expansion pack for Half-Life
      being developed by Gearbox Software and published by Sierra Studios. In
      Opposing Force, you play a soldier, Adrian Shephard that is sent to the
      Black Mesa Research Facility to clean up the mess created by Gordon
      Freeman. Not only will you see Gordon Freeman sometimes, you'll also often
      visit the same places he visited, but at another time.
    
      The expansion pack was released in November, 1999 in the US and December,
      1999 in Europe. Since I live in Europe and I had exams, it took a while
      before this guide was written, but I finished the expansion pack in one
      day and wrote the core of this guide the same day.
    
      Gearbox did an excellent job on the expansion pack. Although they were
      under 'very strong surveillance' from Valve and although they hadn't
      developed anything yet (their game Prax Wars was canned), they created
      the same intense atmosphere from Half Life and had some nifty ideas
      themselves in the game. What to think about the puzzle where you have
      to activate the "Gearbox" and "Valve" ... and the easter egg with the
      speech of the boss. There's more, but I'll tell you that below.
    
      The game's 70% long of the original Half Life and features new weapons,
      new enemies, new levels, new squad team mates, ...
    
      Now who is this Adrian Shephard you're playing with and what does he
      have to do with the story? Remember the marines who gave you so much
      trouble in Half-Life? Now you are one of them and life is not so easy as
      part of the Opposing Force.
    
      When Freeman gets out, the powers-that-be who caused you so much hassle
      in the first instalment resort to Plan B, sending in the Black Ops. As
      one of your nation's finest fighting specimens, you dive into the world of
      Black Mesa. As a soldier sent in to eliminate Gordon Freeman, you are
      separated from your base unit and discover a new alien race amidst the
      chaos. It's quickly revealed that these highly advanced alien life forms,
      known only as Race X, descended upon Earth to pillage the planet from the
      Black Mesa facility when Gordon Freeman transported to the border world of
      Xen.
    
      Just as Gordon discovered when he encountered hostile life forms in
      Half-Life, if you can't live with them, you'd best live without them.
      Thus, it's your characters duty as a Black Op to sort out this mess, even
      though he's quite on his own.
    
      I played the game on the medium difficulty and I don't know whether
      changing the difficulty brings up more enemies, I suspect you only
      sustain more damage. Anyway, I just walked around and noted everything
      down I saw. Go on and read the walkthrough now :)
    
    
    _______________
    III Walkthrough
    ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      3.1 Welcome to Black Mesa
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      After the truly magnificent intro (look to the background for some scenes
      from the original Half Life), you awake inside a scientist's room. Talk to
      the scientist and he'll tell you what's happened. He mentions a radio
      somewhere outside, it's your first mission objective. Go through the door
      and turn right. Turn left and go through the double doors. Look through
      the window, you see some scientists. Turn left and walk to the back. Talk
      to the scientists there (there's one poking a crab). Walk to the back and
      get your power vest from the table on the right. Now return and go left,
      left, right. Look through the window and you see a scientist and a zombie
      grunt in the same room. The zombie grunt wakes up and kills the scientist.
      Yikes. Don't near the window, but go to the left. Crawl to the opening in
      the left of the door and go down the stairs. Talk to the security guard
      and walk to the door. He'll open it for you. Before proceeding to the next
      area, you may use this neat trick Crash Easton sent me to get the desert
      eagle . When Otis opens the door for you, push the chair that`s in the
      room so that it blocks the door. Go grab the wrench and come back. The
      chair will keep the door open and you can crouch jump on it to get back
      to Otis. Introduce him to mister wrench (you may have completely destroy
      his body since he`ll hold to the gun). Having this gun will make the
      first few headcrab less of a pain in the ... or even better go back to
      the scientists near the start point and give them their daily lead
      requirement since they`re all going to die anyway thank to G-man. Then,
      you can proceed to the next area.
    
      There's an electrical wire in the middle of the gangway. Don't touch it or
      you'll get electrical damage. Get the wrench next to the toolbox and walk
      past the electrical wire. You'll enter a room with two beams. You can
      crawl under the green beam. You need to go up the stairs, but the purple
      beam is blocking your path. There's no way to get past it, so read the
      sign on the wall, it says "optical mirrors are very fragile". Use your
      wrench to destroy the optical mirror that reflects the beam over the
      stairs. Go up the stairs then and turn right. Walk forward and the ceiling
      will cave in. Kill the two headcrabs and turn left. You'll see a green
      substance on the floor. Near the substance and retreat at once, a headcrab
      from the left will attack you. Jump across the green pool and jump back
      then. Another head crab will attack you, but it will kill itself if it
      touches the pool when following you. Jump across the pool then and turn
      right.
    
      Look through the door to the right. You see that strange man in the suit
      there, together with a security guard. You can hit the glass to draw their
      attention, but they won't open the door for you. Smash the grates and you
      discover a medikit and an energy cell. Go up the stairs and through the
      door. Smash the crates to find another medikit. Go through the door then
      and you're outside. Go to the right and jump across the gap. It's not
      possible to reach the stone slab, you'll land on the grass below the slab.
      Jump further some more time and jump to the left then, on the small stone
      slab. From there, you can jump to the building to the left. You saw this
      place during the intro too. Walk over the body of the alien slave to get a
      knife. Jump over the gap then and enter the building. Watch out, there's
      a headcrab inside. You can lure him to jump in the gap, but the falling
      damage won't kill it. At least, it can't hurt you from there. Go to the
      back of the building and crouch to enter the small entrance to the right.
      Follow the tunnel.
    
      Walk down the pipes and you enter another place from the intro. You need
      to get to the area past fence, but some beams are blocking your path.
      Don't touch the fence, there's some serious voltage. You need to find a
      way to shut down the power. Walk through the big doors on the right. Kill
      the headcrab. Watch for the gap in the wall on the right, some more
      headcrabs will appear. Kill them and exit through the big doors. Walk
      towards the iron cage and a security guard will near you. Of course, he's
      foolish enough to touch the fence and kill himself. Destroy the crates for
      some more medikits. Go through the small entrance between the big door and
      the cage then. You may need to use your nightvision in here. You'll enter
      a small room with a fan. There are some electric beams, so make sure not
      to touch them. Look to the right and wait until the beam disappears. Move
      forward and wait for the second beam to disappear. Go further and enter
      the small tunnel. Exit and you're inside the cage. There are more beams
      here. Carefully move to the left and then forward. Make sure not to touch
      the fence. Grab the gun (the .357 Desert Eagle, but I'll call it the
      magnum from now on) and crouch to the right below the beam. Go right then
      and you see the "Generator Control" box. Press the "use" key to shut down
      the elevator. Leave the cage through the door then and go through the
      double doors to the right. As soon as you enter, equip your magnum and
      walk backwards. An alien slave will appear, one shot will kill him. Walk
      further then and kill another alien slave.
    
      You're back at the helicopter wreckage then and you can go past it now.
      Walk to the radio in front of you and listen to the orders of your
      commander. Destroy the crates next to the radio for some ammo. The crates
      to the right hold a medikit. Enter the hole on the left then and follow
      the ladder down. Go down the next ladder. Turn right. Watch out, there are
      some barnacles on the ceiling here. Avoid them and go to the left. Go
      through the door and you're back outside.
    
      Go through the door in front of you and follow the hallway. Kill the alien
      slave and get the shotgun next to the marine. Look down and take out the
      alien slave below you before it spots you. You'll have to stand on the
      edge to take him out, you cannot shoot it through the landing you're
      standing on. Follow the ladder down then and take out another alien slave
      a level below you. Crouch to avoid the steam and don't touch the barnacle.
      Go down the ladder and go through the door. Go through the right. Jump
      down and go stand behind the unbreakable dark green box on the right. A
      platform in front of you will come down. As soon as it's down, strafe to
      the left, and take out the alien slaves to the platform. Inside the
      crates, there's a medikit. Go to the left then.
    
      You reach a tricky part here, so be quick and watch out. Jump over the
      small gap and run to the ladder to the right. An alarm goes off and there
      will be electrical beams everywhere that destroy the platforms. Go up the
      ladder quickly and ignore the electrical beams (you will sustain some
      damage). Go stand in front of the door to the right then and watch how the
      beams take out everything. The level of the green toxic waste will start
      to raise. Look to the window to the left. The man in the suit will appear
      and will open the door for you. Enter the gangway and go up the elevator
      then.
    
      Do a crouched jump to get the ammo from the left. Then jump over the toxic
      waste and destroy the crates (not the flammable ones) for some extra items
      There are a lot of nasty headcrabs between the crates here, make sure they
      don't surprise you. You can lure them into the toxic waste if you've got
      some timing. Go to the right then and follow the stairs to the control
      room. Hold the conveyor control button until the conveyor moves almost
      completely to the left. Go to the conveyor then and use the crates to jump
      on top of it. Get the energy pack from the left and press the button there
      to open the cargo door. Jump over the toxic waste into the next room.
    
      Walk past the bars and to the left then. Look to your right, you see a
      broken pipe. Jump inside and the flow will take you into a big pool. Avoid
      he barnacles and follow the water until you see a ladder. Go up the ladder
      and over the bridge. Get he ammo and the grenade from the right. Go to the
      left. In the next room, you can't take the ladders down. Look to the sign,
      it reads "no access during robotic loader procedure". Look to the robot to
      the left. He's stuck because some crates are blocking his path. Shoot the
      crates and the robot will leave the room. Once he's out, you'll be able to
      go down the ladder. Go down the ladder in the back and use the crates to
      jump to the other side. Press the button at the toxic waste overflow
      system and wait until the area is drained. Walk to the big door in the
      back then and push the button. Go through the door and push the button in
      the back to ride the elevator up.
    
      There are some sound dogs up here. Take them out before they can use their
      sound wave attack. Go up the slope and walk to the bed with the plank on
      it to the left. Push it towards the tram. When it's in front of the tram,
      use the crouch jump to get on the plank and jump inside.
    
    
    
      3.2 We're pulling out
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      This level doesn't start too easy. The tram will bring you up. First kill
      the alien slave attacking the scientist. Next, as the tram brings you a
      little higher, take out the two alien slaves (there's one on each side).
      As you continue, you will see an alien slave running in the shaft below
      you. Kill it. The final alien slave is inside a tram that cross your path.
      You can take him out or dodge his beam. The tram will stop and you can
      step out. Take the ammo to the left. As soon as you take it, two alien
      slaves will appear, one in front of the train and one on top of it. Take
      out the one in front first, then the next one. Go to the left and you'll
      meet a security guard. As him to follow you. Let him take out all enemies
      you meet in the next area. Go up the stairs to the left then and look
      through the window. You can't go though the door. The security guard and
      the scientist will be killed. A beam will break the window, so make sure
      you're not standing in front of it. Jump through the window and walk
      towards the door to open it for the security guard. Walk straight forward.
    
      Walk to the door to the right and the security guard will open it for you.
      Inside, you find some ammo. Break the glass window on the left and jump
      inside. Talk to the professor and he will heal you. Walk straight ahead to
      the elevator. Look behind you, there's a broken grate in the wall and some
      headcrabs may leap out. Once going up, you hear some gunfire. Equip a gun
      and take out the alien slaves. There are three of them, but usually, the
      marine is able to take out one. Get the machinegun near the corpse of the
      marine and search all the crates for some ammo. Don't forget to load your
      armour on the HEV station.
    
      There's a security door here, but the security guard refuses to go with
      you, so you have to find another way. Jump on the crates to the right and
      then on the HEV station. Break the grate and follow the tunnel until you
      reach a ladder. Go up the ladder and enter the next room. Look through the
      window, there are some helicopters there. Heal yourself on the medic
      station and go through the door. Talk to your chief, you have to get to
      the hangar. Get the grenade and the satchel charge from the desk. Destroy
      the crates for some more ammo. Go to the marine at the door, he's
      threatening a scientist. Get past the scientist and use the crates to get
      the power cells. Then, destroy the small grate and follow the tunnel down.
      Destroy the crates and go through the door, the fire door will shut behind
      you.
    
      Walk to the door to the left, the man in the suit has closed it. Wait
      until the helicopter takes off and turn around then. Take out the alien
      slaves that appear and go through the hole in the wall on the left then.
      Go to the right.
    
    
      3.3 Missing in Action
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      Go to the left and move forward when the steam disappears. You have to
      crouch now, to move under the pipes. Near the back wall, you see a
      headcrab. Take it out with your pistol. Make sure not to touch the liquid
      on the floor there. Go to the right and two alien slaves appear. Take them
      out. Search the room for some ammo and two power cells. Next, go to the
      set of pipes to the right of the position of the dead headcrab. Climb the
      pipes and smash the grate to the right. Enter the small tunnel. There's a
      grate in the floor. Ignore the first one and smash the second one a little
      further. Jump down and get the medikit from the shelves. Now, go through
      the door and you're back in the first room. Climb the pipes again and
      follow the tunnel. Now smash the first grate and drop down
    
      Below you, there's a pool with an electrical wire. Make sure not to fall
      down or you'll sustain damage. There's an energy cell on a platform
      floating in the pool, but usually, you're at 100% armour at this point, so
      you won't need it. Avoid the tiles in the floor with some
      markings on it end. If you stand on one of those, they will
      drop down. At the end, go right and you reach some fans.
    
      Walk over the small bar and turn right. Jump to the bar at the other fan
      and go right then. Wait until the first team disappears, then quickly walk
      past the second one. If you really don't want to get any damage at all,
      you can also jump on the railing to the left. And then jump to the
      platform past the second steam as soon as the first one disappears. Jump
      to the platform with the door then. Kill the zombie scientists inside
      and search the crates for some ammo. Return and go to the right then.
      There are some fans in front of you.
    
      Walk in the exact middle of the path between the two fans and they won't
      be able to touch you. Go down the ladder and go stand in the exact middle
      of the path between the next two fans. Don't go to the other side of the
      room, go stand in the middle, halfway the path and look to the right. The
      fan only has one blade and below the fan, there's a broken grate. Crouch
      and as soon as the blade passes you, moved forward (crouched) and enter
      the tunnel behind the grate. Jump down and destroy the grates at the end,
      you have to get past some fires now. Wait until the trail of the fire is
      gone and jump. Don't touch the fire, even when you see only a little left.
      For the next fire, it's easier to cross when you stand on the first crate.
      Your timing has to be perfect here, you cannot wait until the fire has
      gone completely. As soon as you see there are only a few sparkles left,
      jump. If you time it right, you can get to the other side without getting
      hurt, just jump a little earlier than your instinct tells you to do :)
    
      Jump to the other side and take out the zombie grunt and the headcrab
      there. Search the crates to the right for an energy cell and a medikit.
      Break the grate in the left wall then and follow the tunnel. Break the
      grate below you and jump down. More fires. Move forward as soon as the
      fire disappears. The next fire is a little more difficult: you have to
      follow the fire to the left. As soon as it's gone, run inside the tunnel
      to the left and jump to the ledge on the right then. From there, take out
      the zombie grunts on the other side. Strafe to avoid their balls. Jump to
      the other side then and kill the zombie scientist and another grunt
      scientist.
    
      Search the marines in the back for some more ammo. Go to the left then.
      There's a fire testing procedure here. There are signs that read "do not
      obstruct the testing process). Naah, do it anyway :) There's an explosive
      crate somewhere around. Push it inside the fire testing tunnel and press
      the "test fire" button then. The explosion will create a hole in the floor
      to the left. Jump inside. Take out the zombie grunt and the headcrabs in
      the tunnel. At the end, look to the pipe to the right. Kill the headcrab
      and get inside then.
    
      Go to the right and break the grate, you're back outside now. Go straight
      forward and jump down. Turn around, there's another grate there. Get
      inside the tunnel and you find some ammo. Jump down then and walk to the
      truck. Talk to the marine and enter the building. Search the back of the
      truck for some ammo. Go to the left then, you'll hear some monsters
      running on the platform above you. Search the crates for a medikit. You
      see two doors with a button to the left. Ignore it and go to the right
      around the corner. Kill the two pit drones (one shot of your shotgun does
      the trick) and search the area for a medikit and two power cells. Return
      to the two doors then and press the button. The door to the right will
      open. Kill the four pit drones inside. Search the back of the truck to
      the left for a trip mine. Go up the stairs then, to the left, there's a
      power cell. Go to the right and search the crates, you find a satchel
      charge and a RPG.
    
      Go straight ahead then and kill the pit drones. You can talk to the
      scientist, but none of them seems to like you. Look through the door on
      the left. Jump to the ledge on the left and go down the ladder then. Take
      the next ladder down and walk to the elevator box. Climb up the grate
      inside and jump through the hole in the wall into the next room. Go to the
      left, you see a sign "caution, wet floor". Make sure not to touch the
      water or you'll get some electrical damage. Jump on the sign and then
      on the crate straight ahead. Jump to the left the and get over the crates.
      Go to the left and push the door to enter an area called "unit 2 power".
      Turn off the power with the "use" key and destroy the crates for some ammo
      Leave and go straight ahead past the crates. Return to the elevator shaft
      and go up the two ladders. Go to the right then and jump towards the
      electrical wire. Climb it up and jump on the elevator box in the air then.
      Enter the box for some power cells and enter the room then.
    
      Go to the left and follow the gangway. You'll be in front of a locked door
      but there's a grate to the left. Break the grate and use the tiny box a
      little further to get inside the tunnel. When you continue, the tunnel
      will collapse. Leave the tunnel and turn around. Go to the area behind the
      tunnel and kill the bull squid there. Next to the marine's corpse, there's
      some ammo. Return and go to the right then to leave the water.
    
      We'll have to do some puzzling here. First, go to the door in the back and
      push the blue crate into the area you came from. Push it to the pile of
      garbage to the right (with the garbage bin with the word "push" on it).
      Use the box to get over the garbage. Look to the room to the right then.
      Break the window and throw a grenade inside. Seek cover and the wall will
      explode. Get inside the room and go through the wall to the right. Now,
      you can push the blue box, through the hole in the wall past the pile of
      garbage. There's another grate there, break it and use the blue box to
      get inside. Just around the corner, there's a headcrab. Kill it. Break
      the grate and enter the next room. Walk straight ahead and a headcrab will
      leap down from a crack in the ceiling. Kill it. Look to the left, there's
      a hole in the floor with scientist. Get the power cells and walk to the
      back of the room then. Turn off the power and climb the wire up then. Jump
      down on the next level.
    
      Go to the right, there are some dead people there. Use the radio. Two
      marines are nearby and they're going to blow the door. Wait until the door
      in the back explodes. Order them to come with you and go to the door to
      the left (the elevator). One of the marines will burn the door open and
      you can get through. Wait until you all stand in the elevator and press
      the button then.
    
    
    
      3.4 Friendly Fire
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      This level starts with some heavy action. As soon as the elevator door
      opens, your squad members rush out and attack the alien slaves in the next
      room. It's possible a squad member gets killed and that's no problem, as
      long as the one with the burner survives. While you take out all the alien
      resistance in the room, he will burn open the exit in the back. When the
      area is clear, follow him. Go to the building in the back for some weapons
      Leave the marine there. Return and go up the stairs. Go through the door
      and enter the office on the right. Kill the alien slaves inside and get
      the ammo and the health pack. Leave the office and go through the door to
      the right.
    
      Slowly walk forward. As soon as you hear the alien slaves teleport.
      Retreat and take them out. Enter the room again and walk forward. Another
      alien slave will appear together with an alien grunt. Kill the both of
      them and go through the door to the right, this is the meeting room. Kill
      the alien slaves inside. When you walk forward, the wall on the left will
      explode and another alien slave appears. Kill him.
    
      Go through the hole in the wall and kill the rest of the alien slaves. Go
      through the door to the right then. There's a crack in the wall in the
      back. Climb inside and use the pipes to go up a level. Use the blocks of
      stone to get another level up. There's a power cell here, next to a
      scientist. Make sure not to touch the barnacle next to it. Jump to the
      other side and climb the ladder up. Run over the bridge and leap over the
      gap. Open the door in the back. Turn left. There's a big pool in front of
      you with toxic waste. On the other side, there's an annoying alien grunt.
      When he stands in front of the explosive crates, shoot them to take him
      out. This area seems uncrossable, but it's possible. You need to swing
      with the purple wires to the other side. Make sure not to touch the
      electrical wire while crossing. If you want to be surenot to get hurt,
      simply shoot one of the power transfer nodes and the whole system will
      die, leaving the wires safe to swing on. Swing to the other side and
      search the crates on the right then for some ammo.
    
      Ride the small elevator up on the right and you find more ammo. Watch out,
      there may be a sound dog around here. Use the radio to listen to your
      chief. You can't hear anything at all, except they're under attack. Go up
      the slope to the right and kill the sounds dogs. Use the construction to
      get out of the hole and talk to the marine, he's a medic. To make him
      heal you, simply keep the "Use" key pressed when standing in front of him
      (ignore his speech). To the left of the marine, there's a broken pipe. Get
      inside and go to the right. Break the grate and you see a strange missile.
      Go to the left then and watch out here, there are some heavily armed
      black-ops agents. This is one of the most exciting parts of the game.
    
      Break the grate and retreat at once, it's not possible to take them out
      by surprise. When they stop shooting, move back into the tunnel and wait
      until they appear. Take them both out, then leave the tunnel and go right.
      Go around the rocket and kill another black ops agent from behind by
      surprise. Search the crates and go to the left then. Stay behind the truck
      and throw some grenades to the area to the left, there are two to three
      blacks ops agents there. When they try to run from the grenade in your
      direction take them out with your machine gun. When they're all dead,
      return to the medic to regain some health.
    
      Return inside the building then and open the door to the left with the
      button. There's a marine inside and he needs medical attention. Go to the
      the other side and take out the sentry gun, open the door and order the
      medic to follow you. Lead him to the marine and let him fix him up. Order
      the both of them to follow you. Lead them outside, to the secure access
      door the medic mentioned. The marine will burn the door ... and get killed
      at once by the sentry gun. Take out the sentry gun and enter. Walk
      straight forward and you meet some more marines. Order them to follow you,
      you'll need their help. In the next area, there are a lot of black ops
      agent and they're extremely deadly. Let your squad members handle the left
      side of the area while you take care of the right side. As soon as you've
      secured area, assist them and nobody of your squad should be dead.
    
      Go up the stairs then and pull the lever at the end, the secure door in
      the back will open. Return and go to the left, to the new area. On the
      left side, there will be an opening with some health and ammo. Walk
      forward and you'll meet more black ops agents. Keep you're squad close to
      you and move forward slowly, while securing every area. When everybody's
      dead, gather the ammo, health and armour and go up the stairs. Pull the
      lever and return to the rails. Go stand on the cart and drive back until
      you see a post. Go past the post and hit it, so it flips. Then, drive the
      cart forward again and it will turn to the right now.
    
      Keep driving until there's another blacks ops agent on your left. Take him
      out and jump through the window inside the room to the left then. Gather
      all the weapons inside and use the small box then to get on top of the
      pipe. Follow it up and break the little grate on the right then. Follow it
      and exit.
    
    
      3.5 We're not alone
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      This is a very weird part. Go to the right and you see Freeman gets inside
      the machine that teleports him to Xen. Run inside the room and avoid the
      fireballs of the monsters. On the other side of the room, a bridge will
      collapse. Climb it and jump inside the teleport. You appear at Xen.
    
      Your aim here is to get inside the teleport high up in the air. To get
      there, use the various jump pads to get on higher levels. There's not
      much to explain here, but at a certain point, you'll find the displacer.
      If you use it on yourself, you will be teleported to the hazard course.
      There, you have to take out some alien slaves, then do a bit of the course
      and crash the window to step in the teleport and return to Xen. You don't
      have to do that, though. When you finally touch the teleport ball in the
      air, you return to earth.
    
    
      3.6 Crush Depth
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      Enter the elevator on the left and ride it down. Go to the right, you see
      a scientist with a radiation suit inside an aquarium. Kill the pit drones
      and use the stations on the wall to fix yourself up. Next, press the
      button at the control panels to release the scientist, he can open all
      secured doors for you. Order him to follow you and go to the other side of
      this area, there's a secured door there that needs identification. Let the
      scientist open the door and kill the squid bull inside the next room.
    
      Go to the next door and let the scientist open it. Oops! You have to find
      another way to get past the door. Return and look to the right, there are
      three aquariums and the one in the middle is broken. Climb the ladder up
      and take out the pit drones. Use the grate to get on the platform where
      the pit drones were and go to the right. A hole in the wall will appear
      and more pit drones will attack you. There are also often pit drones that
      fire at you through a hole in the ceiling, so watch out. Go through the
      hole on the right and kill the pit drones left. At the end of the room,
      crouch to the small tunnel and break the grate at the end. Jump down.
    
      There's some ammo in the back. Next, enter the cabin and push the button.
      You will be teleported into the water. Immediately swim to the right and
      exit the water. You reach a small area with three zombie grunts and two
      head crabs. Take them out and go through the small grate at the end. Jump
      down and you fall into a pool. Swim to the ladder in front of you and go
      up. In the next room, there's a zombie grunt, a zombie scientist and a
      headcrab. They're easy to kill. Go down the ladder and kill the two zombie
      scientists. You can't use the medical station in the back, it's broken.
      Use the HEV station and go down the ladder then. Go to the back of the
      room and turn the wheel to release the big monster in the aquarium. Now
      return to the pool.
    
      Jump into the water and use the displacer on the big water monster to warp
      it to Xen. Swim into his aquarium then and turn the wheel to the left to
      drain the water. Walk forward through the door. Go to the left. Some blue
      electrical rays are blocking your path. Shoot the control box near the
      ceiling behind the rays to disable them. Go through the door then and
      some monsters will appear. Kill the two pit drones and use the displacer
      on the shock trooper. Grab the ammo from the right and go to the left
      then. Enter the airlock and press the button. Go through the next door
      then, grab the ammo and step inside the teleporter. You appear at Xen.
      Walk into the next teleporter and you're back at earth. Push the button
      and the door to the right will open. Jump inside the water and use the
      displacer when both monsters are close to each other. Swim up the small
      shaft then and smash the grate. Walk straight forward.
    
    
      3.7 Vicarious Reality
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      Walk forward, up the pipe and shoot the headcrab behind you. There are
      more headcrabs in this room, so take them out. Go to the right and you
      enter an observation area. The door in front of you is locked, so there
      may be a problem. Behind you, some monsters appear. Take them out. Due to
      their teleportation, one of the windows is broken, jump through it into
      the observation area.
    
      A giant spider, the voltigore, appears. Now you kill it, flee or use the
      displacer on it. When it's gone, push the button in the small room in the
      back, push the button to bring an elevator down and ride it up. Go through
      the door and kill all aliens inside. Go to the right and press the right
      button, this opens a window where you can find some snarks. Go through the
      next door then. There's a medical station on your right. Go to the left
      and search the storage rooms for some energy cells and ammo. Watch out,
      if you open the door to the left storage room, a headcrab leaps towards
      you at once. Go to the elevator and break the upper right window. Jump
      through it with a crouched jump. Climb the grate to get on top of the
      elevator box. Climb the ladder up.
    
      Get on top of it and jump on the ledge. Then, look down and jump on the
      door a little lower. Walk straight forward then and turn left. Follow the
      tunnel through various doors until you can turn left. Ride the elevator
      down. Turn right, there's a medical station there. Go through the door and
      kill the pit drones inside. Break the window then and step outside. Follow
      the ledge to the right down. There are some plants in there with a sharp
      tail, they will take out the sounds dogs. Jump down then and step on the
      little green plants to get a spore for the sporelauncher (you don't have
      it yet). Go to the small door to the left and press the button to open it.
      Ride the elevator up and get the sporelauncher from the right.
    
      Walk around the corner and go past the door. Kill the zombie grunt and
      get another spore. Walk through the door then and go straight ahead,
      through the tunnel. A mysterious light appears in front of you. Go
      through the door. Enter the door on the right and take out all the sounds
      dogs in the room. In the next room, you can push a button to the right. A
      hologram of a scientist appears and you get to know they have been
      experimenting with the barnacles. Go through the next door and get the
      barnacle from the showcase, it's a barnacle gun. You cannot use it as a
      grappling hook on a stone wall, but it serves fine to tear off the head of
      organic creatures. You can experiment a bit with it in the next room. Get
      the power cell then and go through the door.
    
      Kill all the pit drones here and enter the pit. Get some spores and use
      your barnacle gun on one of the organic things on the wall to get to the
      other side. Go down the elevator and kill the headcrabs in the next room.
      Avoid the barnacles and go through the door on the other side. Ride the
      elevator up and go through the door. Kill the pit drone and the shock
      trooper. Go straight ahead then and ride the elevator up. Once up, kill
      the pit drones and the shock trooper. A little further, you find some ammo
      health and energy cells. Then, take the elevator back down and return
      where you met the first shock trooper. Go up the stairs and through the
      door. You see a danger sign. To the left, we have these annoying creatures
      from the original Half Life again.
    
      If you hurt it enough, it will retreat for a short while and that gives
      you the opportunity to pass. It's not always necessary to hurt it, though,
      sometimes you can pass and it misses you. When you passed it, jump down
      and collect all the items you can grab without getting hurt. Next, use
      the barnacle gun on one of the organic structures on top of the wall, next
      to the hole. Get inside the hole and enter the tunnel. Go to the right,
      follow the tunnel and exit. Get down and collect the ammo. Listen to the
      radio, they are in trouble with a big worm. Shut down the power to unit 1
      with the lever. Then, climb back up to the other side of the room and
      smash the grate. You can pass the fan now. Follow the tunnel.
    
    
      3.8 Pit Worm's nest
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      Cross the pool and look to the upper right window in the back. The man in
      the suit is watching you again. Open the door in the back. Kill the bull
      squid in the next room. Push the lever to the right of the door and enter
      the next room. Climb the ladder in the back and gather all the ammo from
      the marines. Open the door and face the pit worm. It gets tough from here.
      Like the tentacles monster in the "Blast Pit" level of the original Half
      Life, gunfire doesn't hurt it, there's a special process to take it out.
      
      Go through the door and jump down to the ledge directly below. Run to the
      right. If the monster already has hurt you at the moment, you first have
      to shoot it in the eye to distract it for a short time. Inside, kill all
      the pit drones. The door in the back is broken, so return. Next to the
      boxes and the corpse of the security guard, you find a spore and a grate.
      Smash the grate and follow the tunnel. You end up on a room with a button
      to 'flush' the toxic waste. Unluckily, you can't do that yet. Go through
      the door on the left and you're on the lowest level near the worm. Run to
      the right and press the button to close the door. You enter the waste
      station 2. Kill the pit drone and go down the ladder. Go through the door
      on the right, you're now in a room with a lot of crates.
    
      Get past the crates to the other side of the room. Go through the door and
      jump past the barnacles over the green pool. Ride the elevator up. Kill
      some more pit drones and push the button. Two walls in the crates room
      will close in. Return to the room. Get all items. In the middle, there's
      a grate. Smash it and you'll drop down in some water. Smash the glass
      and kill the bull squid in the next room. At the end of the room, turn
      right, you read the word "outtake". Push the button to the right and the
      water level will start to raise. Run back fast and let the water take you
      up again. Return to the big worm then (up the ladder and pull the lever
      to open the door).
    
      Run back to the waste control room. The light "gearbox" lights up now,
      but "valve" still needs to be activated. Take the door on the other side
      now. Climb the ladder and take out the pit drones. Quickly run outside,
      pull the lever and the "vent" will be activated. Avoid the green beam of
      the pit monster. Go down the ladder again into the waste control room.
      You still need to activate the valve now. Return through the grate you
      used to enter the waste control room. The iron stairs above you are broken
      so use the two crates to get back on them. The pit monster is still
      looking for you from the lower level. look in front of you, a bit up, you
      see some green organic structures. Use your barnacle gun to get cross the
      distance at once. Turn the wheel and the valve will be activated. By the
      time you've done this, the pit monster will have noticed you, so you'll
      have to hurry. Return from where you came and go back, through the tunnel,
      into the waste control room. Now that the valve & gearbox have been
      activated (check the names, those companies created the game), you can
      push the flush toxic waste button. The monster will get killed (finally).
      Now, get back, all the way up, until you get to the bridge control. It
      isn't blocked anymore, so press the button and a bridge will be formed.
      Cross the bridge. Pull the lever next to the door and continue.
    
    
      3.9 Foxtrot Uniform
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      Go through the door. Kill the bull squid at the end of the area. Walk to
      the end then and go to the right. Kill the bull squid and search the
      crates for some medikits and power cells. Use your barnacle gun on the
      organic structures to get on top of this room. Jump to the ladder then and
      climb it up. You see a black ops truck arrive. Take out the three agents
      that step out from the truck. Just around the corner, there's someone with
      a nasty sentry gun. Use your RPG to take him out at once.
    
      Go to the red crate then and enter it. Watch out, some black ops agents
      may be throwing grenades towards you. From that position, take out the
      black ops in the next area. There are two on the ground and one in a tower
      If you want to play it safe, you can use some snarks to distract the ones
      on the ground. In the meantime, finish them off. The one in the tower
      is harder to get. You can try to get out of his sight, but a shot from
      your RPG also does the trick. Destroy the crates and go to the back then,
      there's a small entrance to the right. Enter the room, there are some
      marines here. Grab all the ammo there and order your squad members to wait
      they can't do anything at the moment.
    
      First, go back outside and throw a grenade (or the secondary fire of the
      submachine gun) into the two towers. There are some agents there you need
      to get rid off. Once they're dead, it's time to deal with the sniper. Go
      back to the marines and go through the entrance. Stay low and seek cover
      all the time. The sniper is in a high position in front of you. Inside a
      building, you'll find a ladder, climb it up and take out the sniper, you
      get a sniper rifle now. There are three entrances to continue now. One is
      blocked by two trip mines above each other (uncrossable) and another by
      two trip mines after each other. The third one is an easy passage, it's
      near the position of the sniper, just past some barrels. It may seem
      tempting to take the easy way, but all the black ops agents will now
      you're coming then. On the other hand, it's not possible to blow them up,
      no matter how far you're standing from the explosion, you'll always die.
      So, the entrance with the two trip mines above each other is not an option
      This is what I did: go to the trip mines that are after each other. Duck
      below the first one and jump over the second one. It doesn't seem to be
      possible to get past the crates. Jump back over the trip mine and then
      jump ON TOP it. Next, jump on the explosive crates and from there, jump
      onto the garbage bin. Now you can get past the crates.
    
      Take out the two black ops agents in front of you with a grenade. There
      are a few more, but you can all take them by surprise because they don't
      suspect you to come from there. When they're all dead, search the crates
      for some energy cells. There also is a sniper rifle lying on the ground.
      Go through the entrance to the left then. Turn left and you see some
      black ops agents fight a shock trooper. Let the alien finish them off,
      then take out the alien. Search the back of the truck on the right for
      some ammo. Go up the platform on the left then and down the manhole. You
      reach one of the trickiest parts in the game, I've spend a lot of time
      there.
    
      You're now inside a labyrinth and there are a lot of voltigores here,
      more than your displacer can handle. First save, find your way through
      the maze, load and play the game for real then. Take out all the
      voltigores. When you're out the maze, you're inside some water. Climb the
      ladder to the right and a lot of pit drones will appear. Run to the
      entrance to the right and pull the lever. Do the same at the other side.
      In the meantime, just ignore the pit drones and make sure you don't get
      hurt too much. You have to do this because the drones just keep on coming
      otherwise. Take out the rest of the drones then. Search the crates for
      some medikits and some RPG (you'll need it). Go through the entrance to
      the other side and you'll in another maze. Take out the voltigores with
      your RPG, satchel charges, displacer, ... Eventually, you will reach their
      nest. Take out the little ones (they're NOT cute, so it's OK). Finally,
      you can leave that damn maze. Go up the ladder and some marines will
      recognize you. They will cut the grate and you can leave the sewers.
      First, grab all the ammo from the shelves, then order them to follow you
      if you want them to help you.
    
      Now, there's only one path you can follow are there are lots of voltigores
      and shock troopers. You will need to use all your explosives and spores to
      take them out. They don't keep respawning, you just have to keep moving on
      and secure the area you just passed. When no alien is alive, you'll see a
      big door that reads "confined space" with an entrance. Get inside. It's
      pretty dark, so you'll need you night vision. Proceed to the next area, a
      huge monster, the Gargantua, awaits you. Look to the far wall in the back,
      there are some alien plants there, so use your barnacle gun to get on the
      other side at once. From there, take out the shock troopers that appear.
    
      Two marines are fighting the Gargantua, but the bridge has been wired.
      Light the fuse and an explosion will kill the Gargantua. Walk to the gap
      in the bridge, there's a pipe to the left with a hole in it.  Jump inside
      the pipe and walk to the right, it will cave in and the flow brings you to
      a new area.
    
    
      3.10 The Package
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      Follow the flow. On the left, you see a grate, but you can't break it.
      Follow the flow a little further and go left then as soon as you can.
      There's a broken grate. Get through it into the water. Turn around and
      look above you, there's a dead marine there. Get the shotgun ammo. Swim to
      the shore and you find some new squad members. Move forward and take out
      the black ops agent in the water. There's one with a sentry gun on the
      other shore. Order you squad members to wait and use your sniper gun to
      shoot the agent from behind a rock in the shoulder. Proceed to the other
      shore then and secure the area. To the right, there are more agents, they
      are usually hiding under water and they're positioned too much to the
      left to take them out with the sentry gun.  Take them out. Then, return to
      the sentry gun. There's a big chance some more black ops agents will
      appear from the shore you came from. Take them out with your sentry gun,
      then follow the water area, to the left of the wreckage of the helicopter.
    
      This is a bit tricky. In the back, on top of a building, there is a black
      ops agent with a mortar launcher. You cannot take him out with your sniper
      rifle because there's some glass shield protecting him. Leave your squad
      members behind and run straight at him. He will miss you as long as you
      don't stand still and keep moving forward because he doesn't aim for your
      movement position. Go to the right of him and get on the platform. From
      there, you can take him down with your sniper rifle. In the crates, you'll
      find some ammo for your RPG. Stay away from the building in the middle.
      As soon as you approach that area, three shock troopers will appear. Go to
      the building to the right of the ordinance area. Enter the building and
      take out the black ops agent to the right, down the stairs.
    
      Listen to the radio, a marine is trapped by black ops, but he'll open the
      bunker doors at the other side of this area. Go back outside. Some black
      ops agents will start firing at you. Retreat inside the building. Once
      you've showed your face, the agents will approach you. As soon as they
      appear in front of the door, take them out with the secondary fire of your
      shotgun, but watch out for grenades. Run to the other side of the area,
      straight forward. One of the double doors of the bunker has been opened.
      Get inside the stockage area. Get on the crates to the left. From there,
      jump to the right, between the two pipes in the back of the room.
      Follow the red light into the new area. Go up the stairs and turn right.
      Take out the black ops agents and search the crates for some items.
    
      Go to the other side then, some agents will await you. Take them out and
      follow the stairs up. Go through and you can use the mortar launcher
      yourself now. First take out all aliens, then aim to the very left and
      high to shoot the stone walls that surround the building to the left.
      Shoot the aliens that appear and run to the building then. Go through the
      door and enter the next area. There's a voltigore here and a lot of
      shock troopers. Take them out. A black ops helicopter will fly over and
      fire at you. Use your RPG to take it down, it gives a really nice
      explosion. Enter the entrance to the right then and kill the shock trooper
      inside. Proceed to the next area.
    
      Enter the back of the truck and get the power cells. Go to the left and
      get the ammo. Climb the ladder. Now jump on the black tap on the roof,
      then on the box and from there on the other roof. Proceed and go down the
      ladder then, you're past the fence now. Crouch under the big door and go
      through the door on the left. Turn off the power and return. Climb the
      ladder. Look down, there's a wire from one roof to another above the
      truck. The power is turned off now, so it's safe. Cross the gap over the
      wire to the other roof. Get the medikit and walk to the box in the back.
      Get on top of it and then inside. Drop down into the ventilation shaft.
    
      Kill the pit drones, go down then and you'll get a lot of enemies to
      battle, about five shock troopers and a voltigore. Take them out. Walk
      forward and a few black ops agents will descend from the ceiling. Take
      them out and walk to the back then. Destroy the crates to the left for
      some items, you'll need them. Go up the jeep then and talk to the security
      guard there, he heard the black ops talking about a bomb. Follow the
      tunnel and enter the next area. Take out the black ops agent guarding the
      door with your sniper rifle. There's another one running around too. Walk
      to the door. The security guard won't let you in, because the bomb is
      armed. Walk past the fences to the left, two black ops agents are working
      on the bomb. Take them out with your sniper rifle and use the "use" key
      then to disable the bomb in the back of the truck. Return to the door and
      the security guard will let you in. Go to the right. Get some items from
      the shelves and ride the elevator down.
    
    
      3.11 Worlds collide
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      From the start, there are more than ten black ops agents and sniper babes
      that await you. Stay close to your starting position and try to take them
      out one by one. If you get to chance to kill two or three at once with a
      grenade, don't hesitate. Throwing a grenade won't work, because they will
      avoid it. You need the secondary fire of the submachinegun or a quick
      satchel charge. When they're all dead, run to the left and take out the
      agent behind the sentry gun. Go to the right of the sentry gun and use the
      crates there to get on the platform. Walk to the back and drop down. Kill
      the black ops agent. Now, look to the right, crates are passing by. Look
      to the wall a little to the right inside the tunnel, there's a small
      alcove you can enter. As soon as a crate has passed, run inside the tunnel
      and stand in the alcove for a short moment. As soon as another crate has
      passed, run to the entrance on the other side. There are some black ops
      agents here, on the platform above you, so throw a quick grenade to take
      them out. Go up the elevator and search the crates behind you. Go straight
      ahead then.
    
      In the back of the room, you see some crates that form a stairway. Use
      them to get as high as possible. Proceed on top of the crates and jump to
      the right inside the entrance. Move forward slowly and look down, there's
      a big fight going on between the black ops and the aliens. Wait until one
      side has lost. Jump from swinging crate to another one and land on top of
      a big crate. From that position, try to take out all resistance with
      grenades and satchel charges. When all resistance has been eliminated, run
      up the slope to the left then. Search the crates and the door on the right
      will open. Talk to the security guard, he has seen a terrible monster.
      Search the shelves and the crates for ammo, you have to be fully equipped
      now. There are also some stations for health and HEV. Enter the elevator
      and press the button to ride it down.
    
      When down, a force will push you back. There's also something
      strange about the gravity. Never mind that and walk forward. Go down
      the stairs an open the door. You reach a room with a ladder and a rope.
      Use the rope to get on a higher level. Look to the left there, there's a
      healing pool near the wall. When fighting the boss, you'll get some
      serious damage. Return often if needed, there's no time limit on fighting
      the boss.
    
      Proceed to the next room. There's a big purple portal here and sentry guns
      on both sides of the railing. Go to the sentry on the left and wait until
      something really big appears from the portal, it's the final boss and he
      looks really mean. There are two weak spots on his body, though, they
      light up a in yellow (I think they are the eyes). Make sure to avoid
      contact with the green toxic waste it breathes. When you shot one eye,
      walk to the sentry gun on the other side and shoot the other one. When
      both eyes are hit, a spot under his belly will open up and you see a
      purple ball, this is his vital spot. Try to hit the purple ball as much
      as you can with your sentry gun, it's the only way to kill it.
      Alternatively, you can also use the RPG from some distance to hit the
      purple ball. You don't have to stand to close to then and it's easier to
      aim (added by CjayC).
      
      Now do the whole process again. Don't forget to return to the health pool
      when your health is low.
    
      Now and then, the purple ball spawns a shock trooper, so make sure to take
      that one out first. The second time you hit the ball, the monster will
      start to destroy a part of the bridge you're standing on and the ladder to
      reach the left sentry gun from the ground. From then on, you'll have to
      use your barnacle gun on the organic structure on the other side to get to
      the left sentry gun. Do the process again until the monster will retreat
      and explode.
    
    
      3.12 The end
      ŻŻŻŻŻŻŻŻŻŻŻŻ
    
      You get to know the man in the suit a little better and the game ends as
      good for the "hero" like Gordon Freeman in the original Half Life. Too
      bad, Shephard :(
    
    
    
    _______________
    IV New monsters
    ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      Not all monsters are new, so I suppose you're familiar with the ones
      from the original Half Life. I'll give a brief overview of the new 
      monsters in Half Life.
    
    
       Zombie Grunt
       ŻŻŻŻŻŻŻŻŻŻŻŻ
         An unfortunate grunt who got himself headcrabbed and turned into a
         zombie. He's much tougher than the zombie scientist. Its gaping chest
         wound opens up and he sticks his hand inside to pull out an acid globs
         to whip at you...  ewww. Like the zombie scientist, you can take them
         out with your knife or your wrench. A few bullets from your pistol in
         his head work fine too. (Thanks J. Anderson)
    
    
       Pit Drone
       ŻŻŻŻŻŻŻŻŻ
         One of the new Race-X aliens, a race of aliens that appeared in Black
         Mesa after Gordon left for Xen. Pit Drones can use their claws for
         close combat and have the ability to shoot spikes from their forehead,
         which regenerate in time. The spikes are shot at a fast speed, so
         you'll have to be quick to avoid them. Usually, they are not so tough
         to take them out, one blow of your shotgun at close distance will take
         them out.
    
    
       Shock Trooper
       ŻŻŻŻŻŻŻŻŻŻŻŻŻ
         This a very nasty alien from the X-Race alien breed. They can create
         portals to call reinforcements. A shock roach is attached to their side
         and they use it to fire. They fire at a very fast firing rate and they
         can take a lot of damage before they die. When it's dead, the shock
         roach leaves the body of the shock trooper and attacks you.
    
    
       Voltigore
       ŻŻŻŻŻŻŻŻŻ
         This is the toughest of the 'regular' aliens. It looks a bit like a
         huge spider and it has two claws that do serious damage. They can also
         spit some purple electricity. When they die, they explode and do some
         radial damage, so don't stand too close.
    
    
    ________
    V Cheats
    ŻŻŻŻŻŻŻŻ
    
      5.1 Easter eggs
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      * When you approach the Boss of Opposing Force, there is a Weird Mumble
        jumbo of sounds. When played backwards they say "To win the game you
        must kill me Randy Pitchford". Just like when you beat Doom 2 who was
        made by John Romero the Co-Founder of Doom. Like ID software, Randy
        Pitchford is the leader of Gearbox Software who made Opposing Force.
    
          Note: An easy way to play the sound is open the pak0.pak file with a
                program like PakExplorer and search for the sound dsbossit
    
        I've put the files online for download to save you the trouble.
        Download them here:
    
          - original file: http://members.xoom.com/Larian2/special/dsbossit.wav
          - reversed file: http://members.xoom.com/Larian2/special/dsbossit2.wav
    
    
      * Go to the level Vicarious Reality. After you  see that holographic
        thing of Walter talking about barnacles, you will enter a freaky dark
        hallway with glass stuff containing alien beings. They are all labeled
        with an ID number and are perfectly safe, except for 007. He escaped
        from his glass prison. If you've ever seen James Bond, which you
        probably have, you know that James ALWAYS escapes. This must be an
        easter egg because 007 is a lot smaller than the other ID numbers. I
        doubt that it's a coincidence.
    
      
      * Just like in Half Life where the names of some of the people who made
        it were put around the lockers in the locker room, the names of some of
        the people who made Opposing Force are also in certain places e.g. at
        the start of the boot camp level look at the names on the boxes beside
        the beds. 
    
    
      * The 'trash compactor' in the "Pit Worm's nest" level is right out of
        starwars (look at the doors and the pattern of lights above the doors)
        (Thanks J Anderson).
    
    
      * Start the "boot camp" and type /noclip in the console to walk through
        walls. Go straight through the floor then and you reach a room with the
        hidden message "DMM 1999". DMM 1999 refers to David Michael Mertz 1999,
        the creator of the bootcamp.
    
    
      * If you're really curious about the man in the suit, you can use the
        "noclip" cheat code to walk throughs walls and doors to follow him.
        You will see him adjusting warheads and you even can take a look
        inside his briefcase.
    
    
      * It's possible to take a good look at Freeman (I'm not talking about the
        various pictures on the wall). At the beginning of Level 5 'We are not
        alone, listen carefully, you'll hear a scientist encouraging "Freeman"
        to hurry. That's Gordon Freeman, the character players portrayed in the
        original Half-Life! Try leaping into the orb to follow him to Xen.
        Unfortunately, you don't land over a platform like he did. For more fun,
        switch to noclip mode and warp inside. You can get a good look at
        Freeman then.
    
    
      * Use PakExplorer to open the half-life\gearbox\pak0.pak file. Go into
        the gfx\env\ folder. There is a texture, named @hackup.tga or
        hackup.tga which says: 
    
         "HACK HACK HACK 
          ALL DAY LONG. 
    
          HACK HACK HACK 
          WHILE I SING 
          THIS SONG." 
    
        It's rather funny, so I searched the game for a place where the texture
        was used. I found the location, you can see it when you're talking
        to the G-man after finsihing the game. You can move when talking to him,
        so do the following. First type "chase_active 1" in the console, then
        type in "thirdperson". You get a better view of the environment now.
        Just look up and you'll see the texture.
    
        The poem is an adjusted version of an Adam Sandler poem. All I remember
        was it was about a janitor and the word "hack" was originally "mop" 
    
      
      * This easter egg gives some problems, becaue I don't recall in which
        level I found it. Anyway, somewhere, there's a filing cabinet/desk
        lying on the floor next to a picture of Gordon Freeman. If you crouch
        and look at the desk, there's a picture of two kids. I assume they're
        the kids of one of the programmers. 
    
    
      * There's a way to play the old Half Life weapons with the new Opposing
        Force weapons. Start Half Life: Opposing Force with the shortcut (as
        written below in the 5.2 cheats section). Open the console and type
        sv_cheats 1 to enable the cheats. To start on the inbaord train then,
        type c0a0, to skip to the faculty, type c0a1. Once you get the
        hazard suit there, type impulse 101 to get allw weapons including the
        ones from Opposing Force.
    
        It's not ENTIRELY compatible; some animations and most Gordon-specific
        sounds will be missing. Just wait and the scientist/barney will let you
        through. Note2: The scientists who would normally be sitting look like
        they're running in place on top of their chairs. This is normal (as far
        as this egg is concerned). 
    
    
      * The Boot Camp is linked in a nice way to the actual game (easter egg
        exposed by Liquid CsHO)
    
         - When you see the push-up guy... look up to the room to your top
           right... G-man is talking to the Sergeant/Colonel (whatever rank)
           that talks to Cooper (Cooper... Do you copy.. we are pulling out...
           if you have any more targets mark them witrh......). Therefore...
           he's in on it too.
    
         - The marines by the osprey are the same marines that company you on
           the ride in... (they don't talk in this scene).
    
         - When you pass boot camp.. the Drill sergeant says "congratulations
           soldier... ...Now report to duty!!"... then you leave on the
           helicopter. If you use the noclip before starting the training, you
           can reach an area with a helicopter, so you can see the marines
           you'll meet later on the game getting on the helicopter already.
    
    
      * The easter eggs just keep on coming and this only is really weird. Open
        up the OPFOR.DLL in the /gearbox/dll directory using wordpad, and do a
        search for "lime". This is what the story says (this is a cut & paste):
    
          .the half-life of lime jello.nuclear bedtime story...crazy
          customizable..programmer's head on a stick....frictionless, massless
          mormon...put it in your report, bill.i don't need the influence..i'm
          coming out of the booth.in the middle of a storm....it tantalizes me
          so.you are my favorite thing...i leave the windows open....and fed
          you to the chickens.candy corn chicken fetus....the silhouette of a
          dog.guns exploding all around...a rising column of smoke....you don't
          jump like a monkey....i have to call chuck....rebel boat rocker...
          colostomy bag...walking in memphis..exploding midget....white cotton
          panties....nub technology..anonymous nub...more bunny justice..evil
          evil boy...you have been a fool....do not send me porn.i must escape
          it....those creamy white thighs...keeping us all cool.air
          conditioning....so what if I sweat..fresh air is so sweet...live mice
          sit on us.digital squirrel....liquid banana...peas and hominy.
          miscellaneous...gravity assist..random tuna head....some quick goat
          thinking....a velvet codpiece...let's tease the weasels. nice
          vomiting spell.a specific dick.the growing yodas...radsuit_finished
          ....pain_finished...air_finished....speed...noise3..noise2..noise1..
          noise...dmgtime.dmg.dmg_save....dmg_take....message.watertype...
          waterlevel..armorvalue..armortype...teleport_time...max_health..
          colormap....flags...spawnflags..groundentity....owner...aiment..
          enemy...dmg_inflictor...chain...impulse.button..view_ofs....deadflag
          ....takedamage..weapons.frags...health..renderfx....rendercolor
          .renderamt...rendermode..blending....controller..framerate...
          animtime....sequence....scale...frame...light_level.friction....
          effects.movetype....solid...nextthink...ltime...maxs....mins....
          absmax..absmin..weaponmodel.viewmodel...modelindex..yaw_speed...
          ideal_yaw...pitch_speed.idealpitch..fixangle....v_angle.punchangle
          ..avelocity...angles..movedir.basevelocity....velocity....oldorigin...
          origin..Master was null or not a master! ...violence_ablood.
          violence_hblood.NULL Ent in UTIL_PrecacheOther .CSaveRestoreBuffer
          :: TokenHash() is COMPLETELY FULL!...Invalid function pointer in
          entity!.Bad field in entity!! ..Bad field type .Can't save more than
          %d entities in an array!!! ....CSave :: BufferHeader() size parameter
          exceeds 'short'!.Save/Restore overflow!..Restore overflow!
    
          ...................SOFTWARE\Microsoft\Cartography\CurrentVersion
          ...SOFTWARE\Microsoft\Cartography..0.9B....gearbox\dq2249.gbx..\
          gearbox.........................................................
          ............... 
    
       This is really crazy, but it's a great easter egg.
    
    
      * If you don't want to search the opfor.dll file, it's also possible to
        get a poem while playing. During gameplay, bring down the console and
        type "haiku" (without the quotes), the game will treat you a strange
        poem (a random generated Haiku from the opfor.dll file).
    
    
      * In the first level after the crash, a zombie throws a scientist
        through a window. If you run around the zombie into the lab, you'll see
        a computer with an ultrasound image. That ultrasound is of Randall
        Steward Pitchford III, the son of Randy Pitchford (the leader of
        Gearbox Software who developed Opposing Force). He was born on
        January 8, after the game shipped!
    
    
      * There's a computer in the room where you meet Otis for the first
        time that looks like it's running MS Windows. If you use the keyboard
        five times, the computer will crash with the "blue screen of death."
    
    
      * If you use the self-teleporting alt. fire of the displacer while
        you're still on Xen (right after you first get the weapon), you'll be
        taken back to the hazard course on Earth. On the corkboard on the wall
        there's a picture of Gearbox designer, Rob Heironimus. He's got Easter
        Egg shells in his eye sockets!
    
    
      * In the Pit Worm's Nest the "gearbox" and "valve" indicators are
        obviously a reference to the creators of the Half-Life games.
    
    
      * This is not really an easter egg, but rather a glitch in the game.In
        the level "The Package" after you kill the two black ops that fall from
        the ceiling, you have to climb up a truck to get in the ceiling in order
        to move to the next part of the map which would be the area where the
        first bomb is. When you get up in the ceiling there is a security guard
        who says something like: "Don't hurt me and I'll tell you a secret. I
        heard some black ops talking about a bomb. etc."  What's neat is this
        guy is only able to be killed by the displacer gun. Everything else
        just makes him say something about being a bully or "don't make me
        throw down on you." Nothing special but neat none-the-less.
    
    
      * Johan sent me a strange bug\easter egg in the game, this is what he
        mailed me (thanks!):
    
          Hi, my name is Johan and I just read your walkthru of Opposing Force.
          I've already finished the game but I wanted to what else there was
          that I've missed myself. One thing I've discovered that you didn't
          have in your guide was that you at one point in the game actually can
          "meet" the black man thats always on the wrong side of the bullet
          proof windows.
    
          I suppose you know that the displacer gun secondary fire teleports
          you to different places in Xen or Earth depending on where you are.
          This can be used at one point to get behind the bullet proof glass
          and inside the same room as the black man.
    
          After you've disarmed the bomb in "The Package" the guard lets you in.
          Walk past him and to the left. Through the glass you see the black
          man, tampering with the bomb you've just disabeled. The bomb later
          goes off after you've killed the big boss at the end. If you use the
          displacer's secondary fire near the glass, you are transported to Xen.
          You should see two aliens here standing in a pool and some weird ball
          floating around in mid air.
    
          I killed the aliens and explored the area a bit. All the holes you
          see in the cave, you can't get in to. I didn't know what those egg
          things are called but I used the little one to get to the medium sized
          one and then into one of the holes. That should be an easy jump, but
          when you reach the hole, there's an invisible wall blocking further
          movement and you fall down. I suppose this is an bug in the game, or
          just bad programming (which is the same, when I come to think of it).
    
          Anyway, when you walk back to where you come from you comes to a
          crossing where you take right to find the teleporter back to earth.
          When I entered something weird happend. I was teleported back to the
          bomb truck. I've did testing and that's the place you are teleported
          back to if you use the displacer gun before you enter the room with
          the guard. If you walk to the back of the truck you will see the
          black man there. He can't be killed of course and there's no way
          out of there here, so you've got to reload an save game if you want
          to move on.
    
          This must be an bug in the game, or maybe an unexpected easter egg.
          Just thought you should know.
    
          Thats it, thats that.
    
            
            Johan
    
    
    
    
      5.2 Cheats
      ŻŻŻŻŻŻŻŻŻŻ
      There are a lot of problems with the cheats, sometimes they all work,
      sometimes half of them work, it depends on the what patch for Half Life
      you're using, what version of Opposing Force you installed and
      apparently a lot of luck.
    
      Go to Windows Explorer. Right click on the hl.exe file (from opposing
      force). Select "create shortcut". Right click on the shortcut. Select
      "properties". Go to the Tab "shortcut" (if not selected already). Go to
      the line that reads "target". There add -dev -console -game gearbox
      behind hl.exe. It will look similar to this now:
    
        "hl.exe" -dev -console -game gearbox
    
    
      Start the game with the shortcut, it will take you to Half Life: opposing
      force at once. From then on, you access the console using ~ (the key
      above Tab and below Esc). The following commands are available in the
      console then:
    
         HAIKU: Random generated poem
         NOCLIP : Walk through walls and fly
         /GOD : God mode
         /NO TARGET : Enemies ignore you
         /GIVE xxxx : Give item xxxx
         /GIVE AMMO_556 : ammo for M249
         /GIVE AMMO_762 : Give ammo for Sniper rifle
         /GIVE WEAPON_X : Replace X by any other weapon names below to get
                          the desired weapon:
    
             * GRAPPLE 
             * KNIFE 
             * PIPEWRENCH 
             * EAGLE 
             * M249 
             * SNIPERRIFLE 
             * DISPLACER 
             * SHOCKRIFLE 
             * SPORELAUNCHER 
    
       
         /MAP xxxx : Replace xxxx with one of the map names below to warp to
                     that level:
    
             * OFBOOT1 
             * OFBOOT2 
             * OFBOOT3 
             * OFBOOT4
    
    
        sv_cheats 1 : After typing this in the console, wait until the game
                      loads a new area of the game, then you can use the
                      following cheat to obtain weapons & ammo: IMPULSE 101
    
                      You can use this cheat again once you're has depleted.
                      Don't forget, using the IMPULSE 101 cheat xill gtive you
                      all the weapons from the original Half Life, not the
                      ones from the Opposing Force walkthrough. This means
                      it's possible then to use weapons (like the Hornet gun)
                      that were not ment to be in the game.
    
    
    
      5.3 Xen Locations
      ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      In Level 5, (we're not alone), you will teleport to Xen where you can find
      the displacer weapon (read the exact instructions and location in the
      walkthrough). This displacer weapon allows you to teleport any monster
      to Xen, but on some specific places of the game, you can also use this
      weapon on yourself to teleport yourself to Xen. You cannot do this
      anywhere, only on the locations written below.
    
      The locations often contain some items or a health pool, so they're
      very useful, but they also serve as fun locations, hidden secrets in
      the game. To use the displacer weapon on yourself, you will need about
      60 cells. The hidden areas in Xen all have portal. Walk through the
      portal and you will return to earth where you teleported.
    
    
        We're not alone (while on Xen)
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        After collecting the displacer from the scientist that falls to death,
        use it at once. Normally, you would transport to Xen now, but since you
        are on Xen already, you will be tranported to Earth, to the hazard
        course of the bootcamp. There, you have to take out some alien slaves
        (they try to attack the instructor hologram and that's quite funny,
        then do a bit of the course and smash the window to the right. Step in
        the teleporter and you will return to Xen.
    
    
        Crush Depth (beginning)
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        Use the displacer in the beginning and you will be teleported to
        a (circular) area with a few bull squids and armor pickups. 
    
    
        Vicarious Reality (beginning) 
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        If you need a full heal and can't find a health station, take a trip to
        Xen here and find a blue healing pool as well as a trapped scientist.
    
    
        Vicarious Reality (at elevator shaft)
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        This takes you to a Xen world with platforms and a flock of alien birds.
        Leaping to the different platforms could gain you an ammunition pack
        and some armor.
    
    
        Pit Worm's Nest (beginning)
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
        This teleports you to an underwater Xen location with health and armor.
        What is that coming out of those tubes near the surface?
    
    
        Pit Worm's Nest (gearbox switch)
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        Save your game before venturing here. You plunge to your death as you
        appear in midair. If you look closely as you fall, you'll spot a
        scientist dangling from one of the platforms. At least he's still
        holding on.
    
    
        Foxtrot Uniform (beginning) 
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        Use your displacer on yourself here for a safe enclosed area with a
        healing pool.
    
    
        Foxtrot Uniform (alien/Black Ops battle)
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        When teleporting here, you will in an enclosed area with a bullsquid
        ready to attack.
    
    
        Foxtrot Uniform (near the end of the level)
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        Here you teleport to a dark set of platforms with a dangerously long
        fall to the return warp orb.
    
    
        Foxtrot Uniform (Voltigore labyrinth)
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
        I haven't tried this one myself, but I'll trust Emilio Hastings who sent
        me this it will work.
    
        After the explosion cuts off the way back up the ladder, the only way 
        to go is into the maze. Facing the skeleton, pull out the displacer gun 
        (you have to have enough energy to get to Xen or it wont work). Start 
        running through the maze, when you get to the first intersection where
        the tunnel splits (choice of going left or straight) go straight. As
        soon as you pass the tunnel on your left a voltigore will start chasing
        you, so as you pass the opening you should activate the displacer to
        take you to Xen. When you get into Xen, you'll be taken to a wide open
        area (simular to ones previous). Kill the two bull squids and go to the
        portal back to Black Mesa. When you go back to black mesa, you should
        end up in the part of the maze where you are supposed to close the
        hatches on the drones. Ending up here completely bypasses about 5
        voltigores and saves considderable ammounts of ammo and health.
    
    
        The Package (beginning)
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        Here you'll find a nice blue healing pool and a very happy scientist.
        This is a rather useful location when you're hurt.
    
     
        The Package (outside at wire) 
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        This teleports you to another underwater area with some health and
        armor.
    
    
        The Package (end of level) 
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        This leads to an enclosed area resembling the one seen during Foxtrot
        Uniform.
    
    
        Worlds Collide (beginning) 
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        This takes you to a Xen area with bullsquids and a small stream.
    
    
        Worlds Collide (inside boss room) 
        ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
        If you're struggling for ammunition, head to Xen from here. You'll find
        a beautiful sky, some platforms, and an ammunition pack
      
    
      
    
    _________________
    VI Links & Greets
    ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
      If you're looking for a good Half Life site, there's only one address:
      Planet Half Life: www.planethalflife.com. They have every single piece of
      information you're looking for.
    
       - Thanks go to Johan & Adam 1 for sending me some incredible easter eggs.
    
       - Thanks Jason Suggs for correcting a little mistake in the walkthrough
    
       - Thanks Crash Easton for the neat trick
    
       - Thanks Chris C Compton for the neat glitch.
    
      If you have any questions, you can always mail me on
      ravager@pandora.be
    
    
    
    __________
    VII Author
    ŻŻŻŻŻŻŻŻŻŻ
    
    Just in case you think you already saw my name somewhere else (what an
    excuse to do some self promotion! :) )
    
    Author: Stijn Bolle
    E-Mail: ravager@pandora.be
    Guides written:
    
      * Aliens vs. Predator (walkthrough\guide)
      * Baldur's Gate (secrets)
      * Discworld (walkthrough)
      * Half Life (multiplayer guide)
      * Half Life: opposing force (guide\walkthrough)
      * Half Life: opposing force (dutch translation)
      * Lands of Lore 3 (guide\walkthrough)
      * Monkey Island III (walkthrough)
    
    
    _________________
    VIII Legal Notice
    ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
    
    None of this file may be copied or reproduced without the explicit
    permission of the author. This guide may be added freely to any guides
    collection site as long as you mail you the url, you don't alter anything
    and you give me full credit. If you're not sure, just mail me on
    ravager@pandora.be

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