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