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.
Earn all achievements
Finish the story.
Ornithologist on paper
Gather all origamis in act 4.
Finish act 3.
Gather all origamis in act 3.
After you! No, after you!
Finish act 2.
Gather all origamis in act 2.
Fnish act 1
Gather all origamis in act 1.
Take a moment to breathe when advised to.
Do not rewind during the 5th scene of the backstage
Hear The Other for the first time.
Finish the exposition.
Get all origamis in the introduction