Here is the full list of all 16 DeadTruth: The Dark Path Ahead achievements.
Get killed by the tripwire.
Pick up first note.
Review the photograph.
Kill both wolves.
Get to the mines.
Collect 4 chemical bottles.
Create a bomb.
Kill the organism.
Kill all the spiders.
Explode the bomb.
Get back to the top.
Hear the devils voice.
Inject yourself with drugs.
Escape from the monster.
Finish the game.
Play the secret game!