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