Here is the full list of all 38 Alone in the Dark achievements.
Find all the lagniappes
Save New Orleans from the Black Goat
Give Grace a present
Own up to your awful past
Open all of the safes and locks in the game.
Play for more than 8 hours
Break the Pact with the Dark Man
Enter hell
Get what you want
Break through the barriers of self-deceit
Return to Derceto
Kill a monster with an opportunity
Walk into the desert
Kill an enemy with Tommy gun
Kill an enemy with fire
Escape the Dark Man
Aim your gun at a human being
Find the Convent of Taroella
Talk to Jeremy in the chapel
Kill an enemy with shotgun
Finish a Lagniappe set
Find Jeremy’s bag
Break through a barrier
Put a talisman socket back together
Find your own talisman
Kill a monster with a melee weapon
Kill a monster with a ranged weapon
Break into Derceto
Finish the game in 3 hours or less
Consider ending it all
Submit to the Dark Man
Join a cult
Talk to everybody about everything
Finish the game without drinking from your flask
Read all the clues
All Achievements