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