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