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