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