Here is the full list of all 22 Witch Hunt achievements.
Kill 3 deadblind in one playthrough.
Find the weird looking skull.
Destroy the sacrificial tree.
Kill 50 enemies in one playthrough.
Make 20 headshots in one playthrough.
Find all save stones in the game.
Fire a cannon.
Kill the beast.
Attack enemy with lightning using thunder totem.
Attack the beast.
Don't get hurt by a whisperer.
Unlock and visit every location behind locked doors.
Unlock all skills in one playthrough.
Unlock 5 chests in one playthrough.
Finish the game without dying.
Finish the game.
Kill the witch.
Save a dog.
Find the book of the dead.
Kill the night flier.
Finish game not using any silver crucifixes or watcher totems.
Finish game in perma mode.