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