Here is the full list of all 27 The Little Ball That Could achievements.
You chose to wander the world with your friends.
Unlock all skins in the game.
Complete a level in under 10 seconds.
Complete a level using the Speedy power.
Complete a level using the Armored power.
Complete a level using the Jumpy power.
Start the Game+ Mode.
You chose to rule your kind.
You've completed all tasks in Orange World.
You've completed all Time tasks.
You've gone through Orange World.
You've found all Puzzle Pieces.
You've collected all Gems.
Break on fall or impact 100 times.
You've completed all tasks in Yellow World.
You've gone through Yellow World.
Get killed by mechanisms 100 times.
You've completed all tasks in Green World.
You've gone through Green World.
Drown 100 times.
Restart from a checkpoint 10 times in a single game.
You've completed all tasks in Blue World.
You've gone through Blue World.
Collect all items in the level and die before reaching the end.
You've completed all tasks in Purple World.
You've gone through Purple World.
Complete a level without activating any checkpoints.