Here is the full list of all 30 The Dark Pictures Anthology: The Devil in Me achievements.
Obtained all of the inventory items
Found all of the Secrets
Kate and Mark rekindled their relationship
Found all of Du'Met's business cards
Mark agreed to Du'Met's proposal
Kate fell for Du'Met's impersonation
Yes, you can pet the dog
Jamie chose to sacrifice herself in the glass trap
Found all of the Silver Framed Secrets
Found all of the White Framed Pictures
Found all of the Black Framed Pictures
Charlie's hand was crushed
Took a photo of each crew member
Everyone survived
No-one survived
Collected 200 obols
Completed the Solo Story
The dog made it off the island alive
The crew didn't trust Charlie and he paid the price
Mark got the lighthouse working
Kate and Jamie both escaped the glass trap
Charlie survived the furnace
Fixed all of the fuse boxes
Jamie chose to save Erin in the suffocation chamber
Jamie reset the fuse box
Charlie maintained control during dinner
Jamie and Erin kissed
Completed the prologue
Jeff and Marie watched each other die
Found all of Mark's photo opportunities