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to keep track of what you have here — unlocked entries stay ticked off, and you can filter down to what is left.
Data from Steam — Steam Web API Terms of Use. Last updated .
| Achievement | How to unlock | Unlocked by | Rarity |
|---|---|---|---|
| Buy the Shotgun gun. | 30% | Uncommon | |
| Unlock the Punk hero. | 32.7% | Uncommon | |
| Unlock the Princess heroine. | 33.6% | Uncommon | |
| Unlock the Pirate hero. | 35.3% | Uncommon | |
| Unlock the Ninja hero. | 37.2 |
| Uncommon |
| Defeat the Horned Boss. | 37.7% | Uncommon |
| Buy the TwinShot gun. | 38.1% | Uncommon |
| Unlock the Mime hero. | 40% | Uncommon |
| Unlock the Hippie hero. | 42.2% | Uncommon |
| Buy the Plasma Pistol gun. | 42.5% | Uncommon |
| Unlock the General hero. | 44.4% | Uncommon |
| Buy the SMG gun. | 45.9% | Uncommon |
| Kill a BrainWorm enemy. | 47% | Uncommon |
| Unlock the Dino hero. | 47% | Uncommon |
| Kill a Shredder enemy. | 47% | Uncommon |
| Unlock the Professor hero. | 50.9% | Common |
| Kill a Hopper enemy. | 51.5% | Common |
| Kill a Bomber enemy. | 51.5% | Common |
| Kill a Track Shooter enemy. | 51.5% | Common |
| Kill a Red Horned enemy. | 51.6% | Common |
| Kill a Zombie Turtle enemy. | 54.1% | Common |
| Unlock the Hobo hero. | 54.4% | Common |
| Kill a Worm enemy. | 56% | Common |
| Defeat the Turtle Boss. | 56% | Common |
| Buy the Magnum gun. | 57.2% | Common |
| Defeat the Muscled Boss. | 57.4% | Common |
| Unlock the Agent hero. | 57.5% | Common |
| Find a Crystal Skull. | 59.4% | Common |
| Unlock the Trucker hero. | 61% | Common |
| Unlock the Lunatic hero. | 65.4% | Common |
| Kill a Zombie Runner enemy. | 67.1% | Common |
| Unlock the Gentleman hero. | 70.2% | Common |
| Kill a Flyer enemy. | 74.2% | Common |
| Kill a Zombie Shooter enemy. | 77.4% | Common |
| Unlock the Cop hero. | 77.8% | Common |
| Kill a Zombie enemy. | 85.6% | Common |