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