There are 12 achievements worth a total of 200 points
Escape the garbage can
Sacrifice 1000 followers (only Player 1 eligible)
Collect all the Secrets in the game (only Player 1 eligible)
Complete a level in co-op
Complete a non-boss level without dying (only Player 1 eligible)
See 8 different Sour Sacrifices in a single level (only Player 1 eligible)
Earn a Campaign Score greater than 300,000 (only Player 1 eligible)
Earn a score greater than 50,000 in a single level (only Player 1 eligible)
Beat the Game (only Player 1 eligible)
Beat Pump-Kind
Beat Dolly-Doll
Beat Semi-Squished