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