Here is the full list of all 16 Shady Part of Me achievements. It takes around 5-6 hours to unlock all of the achievements on Windows.
Finish the exposition.
Fnish act 1
Finish act 2.
Finish act 3.
Finish the story.
Take a moment to breathe when advised to.
Get all origamis in the introduction
Gather all origamis in act 1.
Gather all origamis in act 2.
Gather all origamis in act 3.
Ornithologist on paper
After you! No, after you!
Do not rewind during the 5th scene of the backstage
Hear The Other for the first time.
Earn all achievements
Gather all origamis in act 4.