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