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