Completed a level without taking any damage
You killed Mama Amygdala
You defeated the Papa Cerebellum
Completed a "No Damage" challenge
You killed the King of the spleen
You swallowed 5 eyes in no time!
You took over the prefrontal cortex
Collected all pickups in the game
You ripped out an eye
You got 3 stars on all levels
You defeated the Queen of the Colon
You killed a Turtlepoodle
You completed a time challenge
Escaped Dr. Phluff's acid attack
You took over the duodenum
Completed the game
You completed all challenges
You completed all levels without dying
You made a perfect run
You made it through a level without collecting any pickups