Watch 1000 fleshbirds pop
Defeat a cronenbird in VS mode
Watch 500 fleshbirds pop
Watch 200 fleshbirds pop
Clear 50 waves of cronenbirds in survival mode
Watch 100 fleshbirds pop
Clear 20 waves of cronenbirds in survival mode
Clear 10 waves of cronenbirds in survival mode
Die to ceiling Spikes
Pick up multiple legs powerups at once
Pick up the wings and beak gun powerup at the same time
Win a versus match
Jump through a teleporter
Watch 10 fleshbirds pop
Get squashed by a holo-cube
Block a spike with a tumor
Die to the needles in the hypodermic stage
Get popped by a rolling spike ball
Fall into a meat grinder
Pick up any powerup
Die to a swinging hammer
Win 10 versus matches
Get a kill while you have no legs
Win 100 versus matches
Finish 20 versus matches in a draw