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