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