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