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