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