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