Here is the full list of all 69 Diehard Dungeon achievements.
Escape the dungeon at Diehard rank, in Champion Mode, and defeat the Dungeon Master.
Survive 20 rooms of Survival
Attain Diehard rank.
Complete Fading Light in under 3 minutes.
Destroy 500 containers with fire.
Attain Legend rank.
Defeat the Dungeon Master.
Avoid picking up 20 hearts.
Attain Champion rank.
Escape the dungeon in Champion Mode.
Attain Hero rank.
Avoid opening 10 chests.
Use 20 Teleporters.
Destroy 20 chests.
Attain Slayer rank.
Attain Adept rank.
Escape the dungeon.
Open the gold chest.
Use 50 tokens.
Defeat 200 enemies by setting them on fire.
Attain Valiant rank.
Defeat Giant Oaf.
Obtain Vision ability.
Achieve rank 10 in Mayhem.
Defeat Stumpy.
Obtain Reflex ability.
Obtain Attract ability.
Obtain Sense ability.
Obtain Pierce ability.
The Companion Chest upgrades to its maximum level.
Obtain Dash ability.
Defeat 2000 enemies.
Destroy 300 lights.
Pickup 100 hearts.
Destroy 1000 containers.
Defeat Zombie Chest.
Collect 10,000 treasure.
Obtain Trigger Happy ability.
Attain Warrior rank.
Have 20 tokens.
Obtain Forget-Me-Not ability.
Obtain Houdini ability.
Obtain Looter ability.
Defeat Hive Mind.
Obtain Mithridate ability.
Defeat Evil Chest.
Obtain Slash ability.
Obtain Triple Shot ability.
Obtain Heavy Duty ability.
Defeat Mr Illusion.
Obtain Iron Grip ability.
Obtain Voodoo ability.
Win a Trapdoor game.
Obtain Lightfoot ability.
Obtain Heartbreaker ability.
Obtain Toasty ability.
Obtain Knives ability.
Attain Fighter rank.
Obtain Fireproof ability.
Obtain Courage ability.
Obtain Kaboom ability.
Obtain Scatter ability.
Obtain Repel ability.