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