Here is the full list of all 31 The Forest of Doom achievements.
Find all the artwork in The Forest of Doom
Find all the painted canvas pieces to unlock alternative cover
Fight a feline foe
Face a barrage of eggshell splinters
Successfully use the Net of Entanglement
Be fired upon by arrows in four different encounters
Fight the iconic Shapechanger!
Help two souls out but be duped each time
Bounce your way out of trouble
Use an aromatic bulb to ward off a night terror
Find your new destiny
Wield a carrot as a deadly weapon
Kill a creature who hates 'bwight light'
Reveal the truth about an individual
Tame a flying beast with music
Return a brass bell to its owner
Ride a strange looking horse
Fight a creature that has been darted
Eat a strange fruit
Find the ultimate ending in Medium mode
Release an Earth Elemental on to the world
Suffer at the hands of lycanthropy
Find the ultimate ending in Free Read mode
Buy all of Yaztromo's items
Find the ultimate ending in Hardcore mode
Find the two halves of the dwarfish hammer
Win an arm-wrestling contest
Get caught in an Ogre's tree trap
Be unlucky in a 'Test your Luck' roll
Escape Darkwood Forest!
Be lucky in a 'Test your Luck' roll