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