Here is the full list of all 33 Forgotton Anne achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Don't distill any forgotlings
Get past Tink without tearing her apart
Collect all mementos
Don't distill Tiphany
Keep a steady pace while pumping
Listen to Fig's entire monologue before distilling him
Overtake Fig
Instill all fallen rebels
Don't get jumped by lost pieces
Don't fall during Roof Chase
Take CCU to Struct
Converse with the Practice Dummy
Get Magnum to do your dirty work
Examine PAX's secret room
Complete game
Examine all books
Revisit balcony
Sit on all chairs
Keep up with Fig
Collect half of all mementos
Wing-jump 100 times
Find way through sewers without getting lost
Speak to all forgotlings at Scrappers
Try on dress
Discover Rocket
Overhearing private conversations
Take 1,000 stair steps
Read 10 diary entries
Catch Quill
Collect two mementos
Take a breather in the storage room
Say hi to Pavil
Turn on bedside lamp