| Achievement | How to unlock
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|---|
| 2-4-6-8, Who Do We Appreciate? (75 points) | Complete 88 Mode with 8 heroes remaining
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| 8 Feet Under (15 points) | Kill any hero 8 times
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| 8 To Be You (15 points) | Die 8 times
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| 88 Feet Under (15 points) | Kill any hero 88 times
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| 8th Wonder Of The World (90 points) | Complete Magnificent 8 mode
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| Another One Bites The Dust (15 points) | Kill every unique hero once
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| Assassin (15 points) | Kill your first enemy
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| Assassin 8 (15 points) | Kill 8 enemies in one game
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| Assassin 88 (15 points) | Kill 88 enemies in one game
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| Assassin 888 (30 points) | Kill 888 enemies in total
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| Big-time Bonanza (15 points) | Score 88,888 points
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| Boom Blocks (15 points) | Destroy 88 blocks in a single game
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| Corpse Junkie (15 points) | Die 88 times
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| Déja Vu (15 points) | Play the game 88 times
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| Figure 8 (15 points) | Collect 8 large coins
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| Flash Flawless (15 points) | 16 Perfect rounds
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| Fresh Meat (15 points) | Die for the first time
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| Galactic God (30 points) | Complete the Space Station
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| Grave Robber (15 points) | Revive a hero
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| Ground Zero (15 points) | Complete a level with zero seconds left on the clock
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| High Score Hero (15 points) | Score 8,888 points
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| Jackpot Juggernaut (30 points) | Score 888,888 points
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| Lone Star (90 points) | Complete Solo mode
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| Molten Maestro (30 points) | Complete the Volcano
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| Morgue Filler (30 points) | Die 888 times
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| Mr. Immaculate (30 points) | 32 Perfect rounds
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| Mr. Moneybags (15 points) | Collect 88 large coins
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| Nick Of Time (70 points) | Finish with 8 minutes (or more) remaining on the Doomsday Timer
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| Office Idol (15 points) | Complete the Office
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| Peter Perfect (15 points) | 8 Perfect rounds
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| Pieces Of 8 (15 points) | Collect 8 small coins
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| Pieces Of 88 (15 points) | Collect 88 small coins
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| Room Rookie (15 points) | Complete your first room
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| Sewer Star (30 points) | Complete the Sewers
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| Sweet Sixteen (90 points) | Complete 88 Mode with 16 heroes remaining
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| Whiz Kid (30 points) | Complete any room in under 3 seconds
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