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