Here is the full list of all 26 rooMaze achievements.
Forget skill points and clear your mind
Have a nice time in a mushrooms party
Learn the mage mastery
Complete the easy difficulty
Kill the Usurper
End the Twizzys shenanigans
Locate mushroom investigation
Learn the ranger mastery
Unlock the hotel storage
Find a first aid kit
Have some recovery near barstand
Loose some health with unknown potion
Trunsmuffinicate something
Equip the shoulder bag
Restore health with unknown potion
Descent a little, like it wasn't enough
Equip the Bolt_O_Throw V4.8
Equip the Bolt_O_Throw V15.16
Equip the crystall lamp
Equip all of the M.I. clothes
Eat the disgusting meat shield...
Unlock the Check-point storage
Banish the evil out of the dark picture
Complete the normal difficulty
Complete the "Leper" difficulty