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