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