Here is the full list of all 23 Devious Dungeon achievements. It takes around 5-6 hours to unlock all of the achievements on Windows.
Defeat the Dragon Boss.
Complete the game!
Defeat the Stone Golem Boss.
Receive a blessing from the Priest.
Collect 100 keys.
Defeat the Butcher Boss.
Resurrect more than 25 times.
Destroy 500 crates.
Defeat the Ancient Beholder Boss.
Play over 100 levels!
Kill more than 500 enemies.
Bought an amulet.
Bought some armor.
Defeat the Orc Chief Boss.
Bought a ring.
Spend more than 1500 coins.
Destroy an arrow in mid-air.
Bought a potion.
Bought a new weapon.
Checked the map screen.
Leveled up for the first time!
Read your first tome.
Completed the training level.