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