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