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