Full list of all 39 The Dungeon Beneath achievements.
The base game contains 30 achievements, and there are 4 DLC packs containing 9 achievements.
Reach Abaddon on New Game+.
Reach Abaddon with Mariana.
Win a battle with only your hero left alive.
Reach Abaddon with Elder Gryx.
Defeat The Mind Reaver.
Defeat Simulae Prime.
Acquire a Dragon Scale.
Reach Abaddon with no Fighters.
Defeat The Hand of Abaddon.
Defeat King Fetterbite.
Defeat Abaddon.
Reach Abaddon with Taz'gyn.
Reach Abaddon in under 60 rounds.
Deal 10 or more damage to a single unit with one attack.
Deal 20 or more damage to a single unit with one attack.
Acquire a Searing Sign.
Win a battle in the first round.
Defeat Dungeon Boss Firis.
Defeat the Reanimated Colossus.
Win a battle.
Reach Abaddon with Thardoric of the Hammer.
Reach Abaddon with Eloa.
Reach Abaddon with Dominique Boutroux.
Acquire Iliphar's Arbalest.
Have 10 Armor on a single unit.
Reach Abaddon with no Mages.
Reach Abaddon on New Game++.
Reach Abaddon on New Game+++.
Reach Abaddon on New Game++++.
Reach Abaddon with a Follower in your party.
Reach Abaddon with Xandos.
Challenge a god on New Game++++.
The ultimate test...
Kill an Aurum Worm.
Challenge a god with the Lost Adventurer.
Close the Portal on Legend.
Survive Death's Invitation.
Defeat Death.
Climb more than 200 floors in The Tower.