Here is the full list of all 50 The Dungeoning achievements.
Kill your first enemy
Drink a potion
Collect 100 Gold
Kill 20 Enemies
Kill 100 Enemies
Kill 1000 Enemies
Survived first level
Survived 30 levels
Survived 100 levels
Played 10 games
Played for 30 minutes
Played for 60 minutes
Opened 10 chests
Opened 50 chests
Read 10 scrolls
Read 50 scrolls
Drink 50 potions
Sample 500 fine potions
Fire 100 Arrows
Fire 1000 Arrows
Get poisoned 10 times
Get Burned 10 times
Fall too far 10 times
Smash 10 Blocks
Smash 50 Blocks
Smash 100 Blocks
Cut down 50 bushes.
Cut down 200 bushes
Cut down 500 bushes
Open 10 crates
Open 50 crates
Open 100 crates
Collect 500 gold
Collect 1000 gold
Kill 10 bats
Kill 50 slimes
Kill your own ghost
Kill your ghost 10 times
Kill a mimic
Kill 10 chest monsters
Kill 30 ghosts
Kill 50 rats
Kill 10 Witches
Kill 10 eyesores
Explode 10 barrels
Explode 50 barrels
New Game +
New Game ++
New Game +++
New Game ++++