Here is the full list of all 18 Brave Furries achievements.
Complete all Tower Top puzzles
Complete all Tower Bottom puzzles
Complete all Balcony puzzles
Complete all Bedroom puzzles
Complete all Stairs 2 puzzles
Unlock all minigames on lowest shelf
Unlock all minigames on middle shelf
Complete all Laboratory puzzles
Complete all Kitchen puzzles
Complete all Sitting-room puzzles
Unlock each kind of minigame
Complete all Cloakroom puzzles
Complete all Stairs 1 puzzles
Complete all Storeroom puzzles
Unlock all minigames on top shelf
Unlock your first minigame
Complete all Cellar puzzles
Finish the first puzzle