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.
Defeat the Butcher Boss.
Collect 100 keys.
Defeat the Ancient Beholder Boss.
Resurrect more than 25 times.
Play over 100 levels!
Destroy 500 crates.
Kill more than 500 enemies.
Defeat the Orc Chief Boss.
Read your first tome.
Spend more than 1500 coins.
Bought some armor.
Bought a new weapon.
Receive a blessing from the Priest.
Bought an amulet.
Bought a ring.
Destroy an arrow in mid-air.
Leveled up for the first time!
Bought a potion.
Completed the training level.
Checked the map screen.