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