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