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 Mariana.
Deal 10 or more damage to a single unit with one attack.
Defeat Abaddon.
Reach Abaddon with Elder Gryx.
Acquire Iliphar's Arbalest.
Defeat Simulae Prime.
Defeat King Fetterbite.
Win a battle in the first round.
Reach Abaddon with Dominique Boutroux.
Reach Abaddon with no Fighters.
Reach Abaddon in under 60 rounds.
Reach Abaddon with no Mages.
Defeat The Mind Reaver.
Win a battle with only your hero left alive.
Defeat Dungeon Boss Firis.
Acquire a Dragon Scale.
Defeat the Reanimated Colossus.
Win a battle.
Reach Abaddon with Thardoric of the Hammer.
Reach Abaddon with Eloa.
Reach Abaddon with Taz'gyn.
Defeat The Hand of Abaddon.
Acquire a Searing Sign.
Have 10 Armor on a single unit.
Deal 20 or more damage to a single unit with one attack.
Reach Abaddon on New Game+.
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.