Here is the full list of all 23 Radical Rabbit Stew achievements.
Play through the game without dying
Play through the game in under 2 hours
Play through the game in under 1 hour
Beat Lord Butter without taking damage
Die by lava
Get eaten by bunnies 10 times
Hurl yourself into the void
Disturb someone's rest
Go down the rabbit hole
Read the credits
Complete the game
Collect every blue coin
Collect every spoon
Complete World 2
Beat the angry Lord Butter
Play a multiplayer stage with other people
Explode a rabbit with the bumpers
Pot 100 bunnies
Drown
Complete World 1
Beat the evil Pugs Bunny
Whack-explode a rabbit
Pot multiple rabbits with one bash