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