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