Here is the full list of all 16 Legend of Dungeon achievements.
You brought the treasure back 5 times!
You brought the treasure back 10 times!
Beat the game on Impossible Mode
Change in the bathroom 100 times
Kill Every Boss
Kill Every Boss in a Single Run
Beat the game without picking up the Lantern
beat the game in multiplayer
You brought the treasure back!
Die from Kitten Wraiths
Shoot and kill a teammate
Play the game 100 times without winning
No one will believe you anyway.
Die from Alcohol poisoning
Die in the Tavern
Fall into Lava