Here is the full list of all 15 Mystik Belle achievements.
Complete the game with the true ending.
Get the game's "good" ending.
Discard all the fluff items
Pick up every item in the game at least once.
Detonate a cave-in.
Travel to another world.
Give the lizard its home back.
Retrieve an item from a pool of darkness.
Find the first piece of lore.
Create a replacement metal gear.
Assemble a Jeyden Jar.
Get zapped by a kitteh.
Get rid of the carnivorous plant.
Never leave a room without a hall pass.
Complete the game under an hour.