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