Here is the full list of all 25 Blair Witch achievements.
Help Ellis to get his redemption.
Find out what happened to Peter.
Patch things up with Jess.
End the game without killing any monsters
Pick up all the trash.
Collect all wooden dolls.
Collect all of the psychiatrist's notes.
Collect all victim's photos.
Become Carver
Find out what happened to Bullet.
Break 10 totems.
Let the VA know about the lumberjack's death.
Collect all dog tags of the fallen comrades.
Walk 100 miles...
Let Bullet bring you 10 things
Kill 10 monsters.
Collect the first dog tag.
Score 40 points in Cobra.
Make the pizza guy lose it.
Pay your respects to sheriff Lanning.
Kill your first monster.
Pet the dog
Collect the first wooden doll.
Collect the first psychiatrist's note.
Collect the first victim's photo.