Here is the full list of all 43 Kitten'd achievements.
Earned 25 coins
Find 2 hats!
Earned 10 coins
Get 7 coins on a level.
Find 5 hats!
Find 10 hats!
Find 15 hats!
Throw 5 poops into the trash
Throw 25 poops into the trash
Throw 50 poops into the trash
Throw 100 poops into the trash
Put out 25 fires
Put out 50 fires
Put out 100 fires
Put out 200 fires
Earned 50 coins
Earned 100 coins
Get 7 coins on 5 levels.
Get 7 coins on 10 levels.
Get 7 coins on 15 levels.
Complete 3 levels without breaking anything.
Complete 6 levels without breaking anything.
Complete 10 levels without breaking anything.
Complete 15 levels without breaking anything.
Blast off!
We are going down!
Complete a level with all cats at full happiness
Put the top hat on the American Shorthair
Adopt 20 cats
Upgrade 3 different tools
Upgrade 5 different tools
Upgrade 10 different tools
Upgrade 15 different tools
Destroy everything breakable in a room
Meet the Abyssinian
Meet the Ragdoll
Meet the Siamese
Meet the American Shorthair
Meet the Singapura
Meet the Persian
Meet the Sphynx
All grown up now
It's a new age