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