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