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