Here is the full list of all 23 Myth of Mirka achievements.
Milk was a bad choice
Feed a Super Savage
Admit to murder
Defend the Town of Mirka
Spontaneously combust
Turn into a tree
Get executed by Super Soldiers
Drink a white potion
Drink a purple potion
Get locked up
Find the secret military base
Kill and eat the Town of Mirka
Resurrect Henri
Donate your body to science
Find a cure for Mirkanism
Run for several hours
Pray to the Gods
Find a yeti in your bed
Freeze to death
Scream for help
Look in the cabin window
Throw a rock at the creature
Tell the truth