Here is the full list of all 37 Damned achievements.
Win at the Serenity Asylum
Win at all stages
Survive with no lives remaining
Pick a silver key
Pick up to 30 batteries
Unlock 25 doors
Activate 100 traps
Kill 30 survivors
Break six wooden barricades
Pick a hammer or crowbar
Win 10 games
Activate 25 traps
Win at the Pines Grill Restaurant
Kill 15 survivors
Win at the Black Lake Asylum
Win at the Bodom Hotel
Win at the Factory
Win at the Warehouse
Win at the Rose Crimson Hotel
Win a game as Lurker
Win at the Hund Hills Asylum
Win a game as Phantom
Kill Mia
Kill all the four different survivors
Kill John
Win at the Bright Hotel
Win a game as Mary
Kill Scott
Kill a survivor in the first transformation
Kill Jacob
Win 50 games
Survive alone with the other three survivors dead
Escape with all four survivors
Unlock 100 doors
Hold more than 10 items
With Phantom, see all four survivors
Kill all survivors in a single transformation