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