Here is the full list of all 22 Mistwood Heroes achievements.
Help to Balter Black.
Kill Mr. Lucky.
Kill Brenda.
Get a shovel.
Kill the traitors.
Kill Jeremy.
Kill Carl Cutthroat.
Get the Lightcalibur.
Dig all the graves.
Go through the Nightmare Cave.
Give the Death Book to Jenny Whitemind.
Kill Daniel Darknet.
Rescue the princess.
Survive against Immortal Legion.
Go through the Death Maze.
Forgive Steve several times.
Get a gift from Santa.
Kill Madam Randomize.
Pass the "Test of Fire".
Pass the "Test of Fire" without touching the fire.
Beat the game.
Leave the house.