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