Here is the full list of all 27 The Little Ball That Could achievements.
Start the Game+ Mode.
Complete a level using the Speedy power.
Complete a level using the Armored power.
You've completed all tasks in Orange World.
Complete a level using the Jumpy power.
You've completed all Time tasks.
You chose to wander the world with your friends.
You've gone through Orange World.
You've found all Puzzle Pieces.
You've collected all Gems.
You've completed all tasks in Yellow World.
You've gone through Yellow World.
You've completed all tasks in Green World.
You've gone through Green World.
Get killed by mechanisms 100 times.
You've completed all tasks in Blue World.
You've gone through Blue World.
Break on fall or impact 100 times.
Drown 100 times.
Complete a level in under 10 seconds.
Restart from a checkpoint 10 times in a single game.
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.
You chose to rule your kind.
Unlock all skins in the game.