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