Full list of all 35 A Castle Full of Cats achievements. It takes around 1-2 hours to unlock all of the achievements in the base game on Windows.
The base game contains 31 achievements, and there is 1 DLC pack containing 4 achievements.
Find all cats in the main hall
Find all cats in the kitchen
Find all cats in the pantry
Find all cats in the laboratory
Find all cats in the library
Find all cats in the cell I
Find all cats in the cell II
Find all cats in the cell III
Find all cats in the cell IV
Find all cats in the saferoom
Find all cats in the trapdoor
Find all cats in the secret trapdoor
Find all cats in the mirror passage
Find all cats in the castle
Find all cats in the underground corridor
Find all cats in the dungeons
Find all cats in the bedroom
Find all cats in the cemetery
Meet everyone at the final door
Release Fofiño from the curse
Find the crystal ball
Find the crystal ball upgrade
Deliver the snack
Find all the keys
Find the castle map
Find the hidden castle map
Open the passage
Help a friend from the underground
Return all the kittens to mama cat
Find all the cats
Unlock a magical shortcut
Cats Just Wanna Have Fun
Dress all cats in the party
Finish the Garden
Open the Coffin