| Achievement | How to unlock
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- Attack helicopter (95 points)
| - Pick up the wings and beak gun powerup at the same time.
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| - Jump through a teleporter.
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| - Pick up multiple legs powerups at once.
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- Cooperation makes it happen (25 points)
| - Defeat a cronenbird in VS mode.
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- Critically Endangered (95 points)
| - Watch 1000 fleshbirds pop.
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| - Get a kill while you have no legs.
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| - Watch 500 fleshbirds pop.
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| - Clear 50 waves of cronenbirds in survival mode.
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| - Fall into a meat grinder.
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- How Did You Get Up There? (25 points)
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| - Clear 20 waves of cronenbirds in survival mode.
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- Least Concern (15 points)
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- Met Your Match (25 points)
| - Finish 20 versus matches in a draw.
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- Near Threatened (15 points)
| - Watch 100 fleshbirds pop.
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| - Get popped by a rolling spike ball.
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- Shoulda Looked Up (15 points)
| - Get squashed by a holo-cube.
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| - Clear 10 waves of cronenbirds in survival mode.
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| - Die to a swinging hammer.
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| - Die to the needles in the hypodermic stage.
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| - Watch 200 fleshbirds pop.
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- What doesn't kill you (100 points)
| - Block a spike with a tumor.
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