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