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