Here is the full list of all 20 Guise Of The Wolf achievements.
Complete the game with less than 12 transformations.
Unlock the good ending.
Complete the game without falling or being killed.
Unlock the bad ending.
Prepare the “Wolfsbane”.
Kill more than 10 humans.
Complete the stone beacons task.
Find and read a book about your curse.
Prepare the “Night Watchman”.
Collect 230 Gold.
Rob all pockets.
Solve the card puzzle.
Unlock all chests.
Run and hide from the werewolf.
Learn how to use the werewolf form.
Survive the werewolf attack.
Unlock a normal sized wooden barrier without transformation.
Discover the reason for your invitation.
Realize your new identity.
Collect an optional item.