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|H|a|r|d| |M|o|d|e| |B|o|s|s| |G|u|i|d|e|
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by Shawn Overcash
email: d_s_i_1@c_a_r_o.n_e_t   (remove the underscores)

+--------------+
| Introduction |
+--------------+
This guide is designed to give you the information you need to beat the hard 
mode bosses on Terraria. These three bosses are the supreme challenge in the
game, and can be extremely challenging for unprepared players. This guide will
cover the preparations, equipment, and tactics you will need to defeat these
bosses.

+-----------------+
| Character Build |
+-----------------+
Terraria supports three character builds - Melee, Ranged, and Magic. Before
you beging tackling a hard mode boss, you should decide which character build
you wish to use. Some builds do not work well against some bosses.
   - A melee character is good against The Destroyer, but is completely
     useless against The Twins and Skeletron Prime since they fly.
   - A ranged character is good against The Twins and Skeletron Prime, but
     will have problems with The Destroyer because of his many body segments.
   - A magic character is good against all three bosses.
If you prefer using a melee or ranged character, you will need to switch to
a different character build for the boss battles that they are not good for.
The Equipment section below will talk about the recommended equipment for each
character class.

+-----------+
| Equipment |
+-----------+
-- Armor --
To fight each boss, it is recommended that you have a full set of adamantite
armor, with the headwear that matches your character build - Helmet for melee, 
Mask for ranged, and Headgear for magic. The bosses hit for a lot of damage, 
so you will need all of the protection you can get. Plus, each set gives a
really nice attack bonus for the character build it is made for.

-- Weapon --
For The Twins and Skeletron prime, the best weapon is a fast-firing weapon
with a long range. For ranged characters, the Clockwork Assault rifle is
recommended. You will also need all four ammo slots filled with ammo - cursed
bullets work well because they cause damage over time. An adamantite repeater
can also be used, but is a little more difficult because of the slower rate
of fire. For magic characters, the best weapon is Crystal Storm. 
[Note: If you have already defeated the Destroyer, the Megashark works
very well for these bosses.]

For The Destroyer, a weapon that can hit multiple times is best, because it
will be able to damage multiple body segments. For a melee character, any good
sword, flail, or spear will work. A ranged character can use a clockwork
assault rifle with meteor shot. For magic users, a Magic Scythe works
reasonably well. If you have already defeated the twins, the best weapon to
use is a Magical Harp. The notes can hit an unlimited amount of times until
they disappear, and will bounce off of walls. This will tear through The
Destroyer very quickly.

-- Accessories --
Every character should have a set of Wings. Without wings you simply cannot 
avoid the attacks of the Twins and Skeletron Prime. Angel or Demon Wings will
work. Also, a set of Spectre Boots should be worn to increase the amount of
air time that the wings provide.

Every character should also have an Emblemfor their build. These tokens, 
dropped by the Wall of Flesh, increase all damage of the specified type by 15%.
The Warrior, Ranger, and Sorcerer Emblems benefit melee, ranged, and magic
character builds, respectively.

Magic characters will need a Mana Flower. This will reduce mana usage, but more
importantly will automatically use mana potions when you run out of mana. You
don't want to try to use mana potions manually during a battle.

The last accessory (or accessories) depend on personal choice. Some recommended
ones, in decreasing order, are:
- Philosopher's Stone - to decrease the cooldown time on healing potions.
- Cross Necklace - to increase your invulnerability time after a hit.
- Obsidian Shield - increases defense and prevents knockback.
- Feral Claws for melee characters.
- Band of Starpower for magic characters.
- Band of regeneration.

The Philosopher's Stone is most useful because the bosses do a LOT of damage
when they hit, and you will need to use healing potions to stay alive. The
obsidian shield is nice for the defense, but knockback isn't really a problem 
against the flying bosses. The bands of regeneration/starpower are last choices
because they don't provide enough of a benefit to make much difference.

A Star Cloak is also useful against The Destroyer, since you will get hit often
in an enclosed space.

-- Buffs --
Buffs can make a big difference in your survivability. The following potions
are recommended:
   - Iron Skin
   - Bowl of Soup
   - Archery Potion (for Ranged characters)
   - Magic Power Potion (for Magic characters)
   - Mana Regeneration Potion (for Magic characters)
   - Regeneration Potion
   - Swiftness Potion
   - Thorns Potion
Have several of each of these potions in your inventory, and when you summon
the boss, hit the 'B' key to use them at once. During the battle you can hit
the B key again when buffs wear off to automatically use the potions again.
Don't worry - you won't use a potion for a buff that is still active, so no
potions will be wasted.
[Note: Some people prefer using a gravitation potion for flight, and replacing
the spectre boots withanother accessory, but keeping the wings to prevent 
falling damage.]

For magic characters, you should also make sure to have a crystal ball placed
somewhere convenient, and use it just before summoning the boss. This item
gives a 10 minute buff to several magic attributes.

-- Miscellaneous --
Make sure you have plenty of Greater Healing Potions available, preferably an
entire stack, although hopefully you will not use them all. Each boss will drop
several of these upon death, so you don't have to worry much about restocking
them after a battle. Make sure the potions are on the left side of your
inventory screen so that they will be used first when you hit the 'H' key. It
may also be useful to remap the health key to 'Q' so that it is easier to
use during the boss fight, and so that you don't accidentally drop your weapon
during the fight.

If you are using a magic character, you should also have several stacks of
Greater Mana Potions. You will use these very quickly, and running out during
the middle of the fight is a great way to die.

+----------------+
| Combat Tactics |
+----------------+
-- The Twins --
The Twins are probably the hardest boss. They appear as two Eye of Cthulhu
tied together by a rope. Initially, the red eye (Retinazor) will shoot laser
beams, while the green eye (Spazmatism) will shoot cursed flames. Both eyes
will also charge at you occasionally. When they reach half health, the eyes
will change forms. The red eye will grow a gun that shoots more quickly, and
occasionally shoots a rapid-fire burst of shots. The green eye will grow a
mouth, and alternates between shooting flames like a flamerthrower and making
a very aggressive charge at the player. Since the second form of each eye is
more dangerous, I recommended that you focus all attacks on one eye until it
is dead. That way you don't have to deal with both of the more dangerous forms
at once.

The twins should be fought outside. The key to survival is constant movement.
You should use your wings to full effect. Only hit the ground when you run out
of wing power, and immediately take off again. Wings protect you from falling
damage, so don't float to the ground - drop like a rock. Try to keep your 
distance from the twins, but don't get too far away or they will despawn.

Keep firing constantly - you don't have to make each shot count. If you have
plenty of ammo this shouldn't be a problem. Concentrate on one eye until it is
dead before moving to the other one.

The twins disappear if not defeated by dawn.

-- The Destroyer --
The Destroyer appears as a robotic form of the Eater of Worlds. It is extremely
long - 80 or more segments. Each segment starts with a red probe attached. 
Occasionally The Destroyer will fire a laser at the player from every attached
probe. Outside this can be devastating and impossible to avoid, so it is best
to fight The Destroyer underground in a mid-size cave. You want the cave small
enough so that you have cover from the laser shots, but large enough that you
can move around to avoid the body segments. The key is to just keep attacking
the boss, but try to move away from it enough that you don't take damage from
the passing body segments, and don't get trapped by them.

Unlike the Eater of Worlds, The Destroyer has a single health value, and never
breaks apart. That means that you don't have to deal with more than one worm
at a time. However, once a segment has received a certain amount of damage the
probe will detach and fly after the player. The probes themselves only have 200
health and so should be dispatched relatively quickly.

The Destroyer does less damage when it hits than the other bosses, meaning it
is quite possible to go toe-to-toe with it with a melee weapon. Also, melee
weapons can hit more than once, which help when the body segments are flying by.

The Destroyer will disappear if not defeated by dawn.

-- Skeletron Prime --
Skeletron Prime appears as a giant skill with four robotic arms. Two arms
do melee damage, one shoots lasers, and one drops grenades. Skeletron Prime 
can be fought using the same tactics as The twins - keep flying and shooting
constantly. Landing is especially dangerous because of the grenades that he
shoots. The grenades will pass through wooden platforms, so landing on these
is relatively safe.

The skull is the main target, so focus on it. The arms can be destroyed, but
it isn't really worth the effort. Occasionally the skull will start spinning
and move towards the player for a melee attack. When in this form, its defense
goes up, but it still takes damage, so keep shooting.

If Skeletron Prime is not defeated by dawn it gains the ability to do instant 
kills, and only takes one damage from all attacks.

+------------------------+
| Final Notes and Advice |
+------------------------+
- Make sure you have everything in place before summoning - weapon, armor,
  accessories, healing/mana potions, and buff potions.
- It might be useful to hook one or more heart statues to timers in order to
  generate healing hearts that you can grab them for a quick healing boost.
- This should be obvious, but having a friend to help makes life much easier.
  Not only do you get the additional firepower, but the bosses will only
  despawn if both of you die at once. That means that if you die, you can get
  back into the battle if your friend can survive long enough.
- Start all fights at sundown when the music changes. This will give you the
  maximum amount of time to kill them before sunrise. (You'll need it.)
- During the fight, keep a close eye on your health. Once it gets to about
  halfway (200), use a healing potion.