Here is the full list of all 10 Cat Go! Ultimate Challenge achievements.
Complete the first level.
Finish your workout.
Complete the second level of the game.
Complete the third level of the game.
Complete the fourth level of the game.
Complete the fifth level of the game.
visit the rotunda in Barsikgrad, where Kotofey is located.
Buy hat "Propeller".
buy a hat "Magician"
Buy hat "Kent".