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.
Korben, is that you?
Found him!
Find the secret level.
Collect all postcards pieces in the game.
Fly away!
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.
Visit every New York location.
Visit every wild west location.
Forge the sword.
Visit every German location.
Everyone needs some help.
Visit every Greek location.
Visit every ancient Egypt location.
Catch some fish.
Destroy everything!
Do nothing and enjoy the moment.
Solve level without any hints.
Wow, that was quick!
Collect all cats on one level.
I knew it!