Here is the full list of all 20 Woolfe - The Red Hood Diaries achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Defeat Woolfe on hard.
Finish the harbour on hard.
Kill 100 kickstarter backers.
Escape the guards without dying.
Kill 50 rats.
Chase Woolfe through the woods without dying.
Defeat Woolfe and listen to what Grandma has to say.
Discover all combo's
Kill 20 Fairies.
Unlock 18 diary entries.
Visit the outhouse in the Forest Adrift
Defeat the Pied Piper
Drown right after Red tells you she can't swim.
Defeat the big rat.
Find Reds axe
Roll...
Unlock 6 diary entries.
Unlock 36 diary entries
Kill a Tesla guard
Be quicker than the dev's and finish A Forest Adrift in less then 4 minutes and 56 seconds