Here is the full list of all 24 Twin Mirror achievements.
Finish the "Memory lane" scene
Finish the "Raise a glass" scene
Finish the "Wake up!" scene
Finish the "Ghosts" scene
Finish the "To catch a fish" scene
Finish the "Refuge" scene
Stay in your hometown
Leave for pastures new
Explore all the endings
You've chosen your social self
You've chosen your analytical self
You've made 60% of your decisions as your analytical self
You've made 60% of your decisions as your social self
You kept Anna alive by putting yourself in your opponent's shoes
You kept Anna alive by outsmarting your opponent
Find your way out of the infinite hallway without help
Play an old favorite
Reconstruct Dennis's murder without help
Talk to Anna without asking for advice
Crack the code on Nick's fishing bag on your first try
Find one memento
Find all the mementos
Relive one memory
Relive all your memories