Achievement Details


Defeat every boss.

3 guides

Achievement Guide for Exterminator

  • DaeryoonDaeryoon403,645
    04 Jan 2015 02 Jan 2015 13 Mar 2018
    52 1 8

    King Slime - Summoned with Slime Crown
    Eye of Cthulu - Summoned with Suspicious Looking Eye at night ONLY
    Eater of Worlds - Summoned with Worm Food in Corruption Biome or by destroying 3 Shadow Orbs
    Skeletron - Summoned by equipping Clothier Doll in an accessory slot and slaying the Clothier at night or by going to Old Man in front of the Dungeon at night to lift his curse
    Brain of Cthulu - Summoned with Bloody Spine in Crimson Biome or by destroying 3 Demon Hearts
    Queen Bee - Summoned with Abeemination in Jungle Biome or by destroying the Baby in the Hive in the Underground Jungle Biome
    Wall of Flesh - Summoned by sacrificing (burn in lava) a Guide Doll in the Underworld Biome; this unlocks Hard Mode and gives an achievement:
    TerrariaChallenge AcceptedThe Challenge Accepted achievement in Terraria worth 45 pointsUnlock Hard Mode.

    Check it for tricks on killing this boss.


    The Twins (Retinazer and Spasmatism) - Summoned with Mechanical Eye at night ONLY (upgraded form of Eye of Cthulu)
    The Destroyer - Summoned with Mechanical Worm at night ONLY (upgraded form of Eater of Worlds)
    Skeletron Prime - Summoned with Mechanical Skull at night ONLY (upgraded form of Skeletron)
    Ocram - Summoned with Suspicious Looking Skull at night ONLY [BOSS HAS BEEN REMOVED]
    Plantera - Must Destroy one of the Mechanical Bosses (Twins, Destroyer and Skeletron Prime) to get the message "The Jungle Grows restless." This will spawn a Plantera bulb in the Underground Jungle, which you must destroy with a pickaxe. They are glowing pink bulbs. You can continue killing the mechanical bosses to spawn more bulbs.
    Golem - Summoned by using Lihzahrd Power Cell at Lihzahrd Altar (found in Jungle Temple and may be relocated); need key from Plantera to get in Temple


    Slime Crown - Gold/Platinum Crown and 99 Gel at Demon/Crimson Altar
    Suspicious Looking Eye - 6 Lens at Demon/Crimson Altar
    Bloody Spine - 15 Vertebrae at Demon/Crimson Altar
    Worm Food - 30 Vile Powders and 15 Rotten Chunks at Demon/Crimson Altar
    Clothier Voodoo Doll - rare drop from Angry Bones or Dark Casters in Dungeon
    Guide Voodoo Doll - dropped by Voodoo Demons in the Underworld
    Abeemination - 5 Honey blocks, 1 Stinger, 1 Bottled Honey, 5 Hives, 5 Crispy Honey Blocks, and 5 Obsidian at Demon/Crimson Altar
    Mechanical Eye - 3 lens, 5 Lead/Iron bars, 5 Copper bars, 7 Soul of Light at Mythril/Orichalum Anvil
    Mechanical Skull - 30 Bones, 5 Lead/Iron bars, 5 Copper bars, 5 Soul of Night, 5 Soul of Light at Mythril/Orichalum Anvil
    Mechanical Worm - 6 Rotten Chunks/Vertebrae, 6 Soul of Night, 5 Lead/Iron Bars at Mythril/Orichalcum Anvil (thanks ThaDevilzHand)
    Suspicious Looking Skull - 1 Mechanical Skull, 2 Mechanical Eyes, 10 Adamantite bars, 5 Soul of Light, 5 Soul of Night at Mythril/Orichalum Anvil [BOSS HAS BEEN REMOVED]
    Lihzahrd Power Cell
    - found in Jungle Temple from Lihzahrds or in chests

    Check out the Terraria Wiki for tricks for each boss
    It is recommended to BUILD AN ARENA to fight them in that is close to your home/bed for quick respawning and getting back in the fray.
    It is also easiest to kill bosses with other friends in a co-op setting.
    The duplicating method is easiest for obtaining the summon items or ingredients to craft them, or any weapons/armor.
    Check the Leaderboards to make sure each boss has been killed and recorded, and note that Queen Bee, Brain of Cthulu, Plantera and Golem are NOT LISTED in the Leaderboards.
    Note that Duke Fishron, the Pumpkin Moon, Frost Moon, or Lunar Event creatures and bosses do not count for the achievement!
    Feel free to add a comment and I will credit you in the solution. :)

    NOTE: if boosting, as long as you are present for the death of ANY boss and get the message "(Boss Name) has been defeated" it counts for you on the Leaderboards and for the achievement. -- thanks to iiTz xFIREL0RDx for pointing this out.
  • StubbornBritStubbornBrit335,515
    27 Nov 2014 29 Nov 2014 09 Jan 2015
    13 1 0
    Bosses available pre-hard mode are:

    Skeletron - speak to the Old Man at the entrance of the dungeon to awaken him.

    Eye of Cthulhu - has a 1 in 3 chance of spawning at the beginning of each night, once the player has 200 HP or more, 3 or more NPCs living in houses, and over 10 Defense. It will continue to do so until defeated for the first time. It can also be summoned using a Suspicious Looking Eye at night.

    Brain of Cthulhu - will spawn after 3 crimson hearts (found in Crimson) are broken, can also be summoned using a bloody spine.

    Eater of worlds - will spawn after 3 shadow orbs (found in Corruption) are broken, can also be summoned using worm food.

    King Slime - can be summoned with a slime crown (gold/platinum crown + 99 gel) can also appear rarely by itself in the outer third of the map.

    Queen Bee - can be summoned by breaking her offspring within a hive (there are usually a few) underground in the jungle. Can also be summoned using abeemination.

    Wall of Flesh - this enemy (once defeated) will change your world into hard mode. He is summoned by dropping a guide voodoo doll (dropped by Voodoo demons in hell) into lava.

    Hard mode bosses are:

    The Destroyer - summoned by crafting and using a Mechanical Worm anywhere, but can only be spawned at night.

    The Twins - summoned by using a Mechanical Eye at night.

    Skeletron Prime - summoned by crafting and using a Mechanical Skull, but can only be summoned at night.

    Plantera - summoned by destroying a plantera bulb (it glows bright pink) in the jungle underground.

    Ocram - summoned with the Suspicious Looking Skull. It requires two Mechanical Eyes, one Mechanical Skull, ten Adamantite Bars, five Soul of Night and five Soul of Light. Mix these at a Mythril Anvil.

    Golem - summoned by using a Lihzahrd Power Cell (dropped by the enemies within the temple) at the Lihzahrd Altar in the Jungle Temple. In order to access the Jungle Temple, you must first defeat Plantera to obtain the Temple Key.
  • Calex dEUSCalex dEUS927,881
    18 Jan 2016 15 Jan 2016 16 Jan 2016
    6 0 0
    The other guides are good but alas I was playing solo and even with duping materials with a second account I was still under-geared and struggling to do good damage to hard mode bosses, especially the twins and skeletron prime.

    Fear not I found an easy way to cheese them laugh

    This requires you to have the pirate captain NPC, for him to show up you need to have a pirate invasion and, the odds of this occurring randomly are low enough so we need to make it happen with a pirate map, grab a water candle from the dungeon or a battle potion will do so enemies spawn more and go to the far left/right of the map to the ocean and place the candle or use potion and kill fish till you get the map, then use it and beat the pirates (120 i think)

    Once the npc shows up buy cannons and cannon balls from him , cannon costs 25 gold so might be wise to either dupe gold or the cannon and ammo with a second account .

    Build an arena about the size of your screen , basically a box to fight in and line the bottom of it with cannons pointing up, add some heart lanterns and camp fires too. Summon the boss and hit X to use as many buff potions as you have in your inventory with a single press of a button and have the cannon ball ammo selected , then it's a matter or strafing left to right keeping an eye on your health and holding RT you use the cannons to blast the bosses . Cannon balls do 300 damage each so they should rip the boss to shreds, I don't think there is anything in the game at that point that can do that kind of damage that early on in hard mode ?

    Here is a video of me killing a boss with this set up

    IMPORTANT: Make sure your cursor / pointer is on auto and not manual when firing cannons other wise you will have to aim at each cannot to fire it. When it's on auto you can just move left and right holding RT to fire them as you pass.

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