Here is the full list of all 22 Witch Hunt achievements.
Save a dog.
Finish the game.
Find the weird looking skull.
Kill the witch.
Find the book of the dead.
Destroy the sacrificial tree.
Kill 50 enemies in one playthrough.
Kill the beast.
Make 20 headshots in one playthrough.
Kill 3 deadblind in one playthrough.
Find all save stones in the game.
Fire a cannon.
Kill the night flier.
Attack the beast.
Attack enemy with lightning using thunder totem.
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 game not using any silver crucifixes or watcher totems.
Finish game in perma mode.