Here is the full list of all 20 Guise Of The Wolf achievements.
Complete the game with less than 12 transformations.
Collect 230 Gold.
Unlock the bad ending.
Kill more than 10 humans.
Rob all pockets.
Unlock the good ending.
Complete the game without falling or being killed.
Prepare the “Wolfsbane”.
Prepare the “Night Watchman”.
Complete the stone beacons task.
Solve the card puzzle.
Find and read a book about your curse.
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.