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Exterminator achievement in Terraria (Xbox 360)

Exterminator

Defeat every boss.

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How to unlock the Exterminator achievement

Daeryoon
24 Nov 2013 28 May 2014 13 Mar 2018
49 2 25
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PRE-HARD MODE BOSSES

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:
The It's Hard achievement in Terraria worth 47 pointsUnleash the ancient spirits of light and darkness across your world.

Check it for tricks on killing this boss.

HARD MODE BOSSES

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

SUMMON ITEM RECIPES

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

TIPS/TRICKS
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.
Guide not helping? View 3 more guides for this achievement.
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small trick if you use a second controller and place it farther than your spawnpoint and your boss fight spot and the boss will wait for you to respawn
Posted by Spite knight On 28 Aug 21 at 00:20

Ocram is still in the game and still needed to unlock this.
Posted by Games Master On 28 Feb 22 at 16:48

Yeah, I can confirm Ocram is required for the achievement.
Posted by MagicaL Marz On 11 May 22 at 01:53

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cyb182
04 Apr 2013 31 Mar 2013
14 7 23
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There are now 9 bosses needed, as there were only 8 on Terraria PC.
There are 5 non-hard mode bosses

King Slime
Eye of Cthulhu
Eater of Worlds
Skeletron
Wall of Flesh

When the Wall of Flesh is defeated, your world becomes hard mode. Then there are 4 bosses that can be fought in hard mode.

The Twins
The Destroyer
Skeletron Prime
Ocram

Ocram is the new boss. He is summoned with the Suspicious Looking Skull, which is crafted with 2 Mechanical Eyes, a Mechanical Skull, 20 Adamantite Bars, 10 Souls of Night, and 10 Souls of Light. He can be spawned anywhere but only at night. He has the properties of The Twins and Skeletron Prime in that he spawns Servants of Ocram to help him and he shoots lasers vertically and horizontally to attack. You MUST have full Halllowed Armor, or is you really can't get that yet, Adamantite Armor might do the job. A very powerful sword such as Excalibur will do, and stock up on LOTS of potions, you will need them. A powerful gun like the Minishark will to for when he is out of reach of your hits. After you have killed the 8 bosses plus the new Ocram, the Achievement is yours.
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Still cant find any plantera bulbs. :(
Posted by Draco719 on 22 May 14 04:31:38

The more hardcore Bosses you beat the more bulbs that appear.... At least thats what happens in the PC version and it appears thats what happen for me on the xbox version
Posted by LONGSTON On 22 May 14 at 08:04

Hmm, alrighty ill kill me some more bosses :D
Posted by Draco719 On 22 May 14 at 16:07

Kind of a late comment since the game has been out a while but I'm looking for help to fight the bosses or a kind individual willing to help drop powerful items or powerful crafting materials. Please message Shaolin Link on 360.
Posted by Shaolin Link On 08 Jul 15 at 13:58
DROGTURIST
05 May 2013 04 May 2013
7 3 3
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If you've seen my solutions for the other Hardmode boss achievements, you'll know what the below says and, yes, it still works on Ocram! All you have to do is build the Hellstone skybridge and stand still while pumping rounds into him from your Megashark. That's it, that's the entire strategy and it works perfectly!

Read on if you haven't heard of the Hellstone strategy before, I think you're going to like it.

FIRST THINGS FIRST
You need to start out by preparing by getting a few choice items. Here's what I use to kill this boss in just a couple of minutes and with no fear of death:

- Megashark
- Greater Healing Potion (5 or so)
- Band of Regeneration (+4 defense)
- Philosopher's Stone (+4 defense)
- Cross Necklace (+4 defense)
- Ironskin Potion (1 per fight)
- Thorns Potion (1 per fight)
- 150 Hellstone Ore (or so, up to you how much of it you want to grind)
- Crystal Bullets (500 per fight)

Anything else really doesn't matter, not even armor, thanks to the method I'll be going into below. You will want at least Adamantite armor though, of course, and it will help if you give all of your accessories +4 defense ("Warding"), for an additional 20 defense. You can get the Philsopher's Stone and Cross Necklace from the Mimic enemy, found deep in the caverns. If you can't be bothered to grind the Mimic for both, try for the Cross Necklace first as the strategy doesn't work without it.

Crystal Bullets are made by buying Musket Balls from the Arms Dealer and combining them with Crystal Shards, which are plentiful in the Underground Hallow (white parts on your map).

Keep in mind that you can buy multiple Musket Balls by holding RT! That confused me thoroughly until I figured it out.

+4 DEFENSE AND LEGENDARY GEAR, WTF?
You can reforge items with help from the Goblin Tinkerer, with the goal of making your weapons "Godly" or "Legendary" and to give you accessories +4 defense ("Warding") each, but it can get incredibly expensive. The are only two reasonable methods for getting that much money, the first of which is to build a "bird engine" and hook it up to goldfish or gel generators - you can google those concepts if you prefer to do it "legit." The other method involves abusing a glitch (which might have been patched when you're reading this in the future) involving an Ice Rod and a Gold Chest.

You can get the Ice Rod from the Wizard NPC, who you have to find somewhere in the world after entering Hardmode, and use it to put two ice blocks in mid-air somewhere in your village. Quickly put a gold chest on the ice, and stuff some useless junk in the chest (like a mushroom or something), then let the ice melt, save your game and leave the world. When you come back, the ice will be gone and the chest will be floating. If you smack at it with a hammer, it will still be there while you get 4 Gold Chests in your inventory. Just hold down RT until you've filled your inventory. A 75% full inventory will yield about a platinum and a half (i.e. 150 gold) and it'll only take a few minutes to fill if you rubberband RT.

So now that you have infinite money, use it to reforge all your items until they're the best they can be. I haven't been able to find a comprehensive list of the best buffs for each weapon, though, and unfortunately not every weapon/item has all buffs. Experiment and waste some money; you have enough!

ALL RIGHT, WHAT'S THE STRATEGY ALREADY?
What we'll be doing is building a Hellstone skybridge and abusing the Cross Necklace to basically exclude the boss from hurting you, and only taking (very little) damage from the Hellstone. This, of course, means you can't be wearing the Obsidian Skull or Obsidian Horseshoe.

Just build a tower straight up into the sky - it doesn't have to be very high but my skybridge is about halfway to space. Build a bridge extending from this tower, made out of Hellstone. I put down about 150-200 Hellstone and created a bridge that was about 3 screens long (on my TV).

With Cross Necklace equipped, you can't be pummeled with damage, which means that if you keep standing on the Hellstone, you'll keep taking 1-3 damage instead of taking 40-100 damage from the boss attacks. The combination of Cross Necklace and Hellstone means that you're effectively stopping the boss from being able to hurt you at all; you can stand in his face and not take damage as long as you're doing it on Hellstone with the Cross equipped.

Once you've built your Hellstone skybridge and collected the mentioned items, you'll be ready to take on the boss with ease. Activate the summoning item and just walk back and forth on your Hellstone, avoiding jumps as much as you can, while pummeling the boss with your best melee weapon if its close, and the Megashark and Crystal Bullets if its far away.

Here's a video example, it uses Skeletron but the same strategy applies to all Hardmode bosses:
Showing all 3 comments.
I can confirm the Gold Chest exploit mentioned for unlimited coin no longer works, and neither does the Hellstone Trick for minimal damage.
Posted by Daeryoon On 30 May 14 at 16:13

Kind of a late comment since the game has been out a while but I'm looking for help to fight the bosses or a kind individual willing to help drop powerful items or powerful crafting materials. Please message Shaolin Link on 360.
Posted by Shaolin Link On 08 Jul 15 at 13:59

I can confirm what Daeryoon said, the Hellstone trick doesn't work. I just tried it, was taking constant 5 damage, even with life regen potions, life regen accessories, and standing next to a campfire I lost an entire row of Gold Hearts (250 HP) in about 10 seconds.
Posted by DrSchlepenstein On 21 Feb 16 at 20:42

There is 1 other guide for this achievement

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