Here is the full list of all 50 DarkSelf: Other Mind achievements.
You Reached Chapter 1
Finished the Word Proposal
You Reached Chapter 2
Finished the Word Pregnancy
Picked up the Flashlight
You Reached Chapter 3
Finished the Word Storm
Picked up the Candle
You Reached Chapter 4
Finished the Word Birth
Picked up the Broken Glass
You Reached Chapter 5
Finished the Word Caring
You Reached Chapter 6
Finished the Word Christmas
You Reached Chapter 7
Finished the Word Impatience
You Reached Chapter 8
Finished the Word Fault
You Reached Chapter 9
Finished the Word Sick
Picked up the Transparent Doll
You Reached Chapter 10
Finished the Word Birthday
You Reached Chapter 11
Finished the Word Drunk
You Reached Chapter 12
Finished the Word Books
You Reached Chapter 13
Finished the Word Violence
You Reached Chapter 14
Finished the Word Crying
You Reached Chapter 15
Finished the Word Footage
You Reached Chapter 16
Finished the Word Murder
You Reached Chapter 17
Finished the Word Lies
You Reached Chapter 18
Finished the Word Rape
Picked up the SmartPhone
You Reached Chapter 19
Finished the Word Bleeding
You Reached Chapter 20
Finished the Word Uncontrollable
Picked up the TimeBall
You Reached Chapter 21
Finished the Word DarkSelf
Picked up All of the Items
You Completed the Game