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