Here is the full list of all 24 Cats in Time achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Everyone needs some help.
Fly away!
I knew it!
Find the secret level.
Collect all postcards pieces in the game.
Collect every cat in the game.
Visit (almost) every location in the game.
Visit every period in the game.
Visit every underwater location.
Visit every Tokyo location.
Korben, is that you?
Visit every New York location.
Found him!
Visit every wild west location.
Visit every German location.
Forge the sword.
Visit every Greek location.
Visit every ancient Egypt location.
Catch some fish.
Do nothing and enjoy the moment.
Solve level without any hints.
Wow, that was quick!
Collect all cats on one level.
Destroy everything!