Here is the full list of all 16 Devil Inside Us: Roots of Evil achievements worth 1,000 gamerscore.
Get the shotgun
Find 2 secrets
Find 4 secrets
Find 6 secrets
Look the pig closely
Find the place in front of the house
Walk through the endless corridor
Kill 3 devil dogs
Find David on the house (1984)
Find the first key in the first level
Reach zero stamina
Exorcise the Devil
Go behind the outside bathroom (1984)
Go to the shower
Finish the game
Get all the achievements