Here is the full list of all 18 Isle of Maligree achievements.
Finish the story playing as the Oracle.
Finish the story playing as the Arcane Talent.
Finish the story playing as the Technician.
Achieve an Aura score of 13.
Achieve a score of 8 in any skill.
Have a score of -3 in any skill.
Become insane.
Go to sleep at the end of the first day.
Go to sleep at the end of the second day.
Go to sleep at the end of the third day.
Pick up an item which gives insanity.
Get a wound.
Get 4 wounds.
Pet Alistair
Get the best hug of your life.
Vibe the crab!
Resist the curse of a witch!
Knock out the witch!