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