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