Full list of all 39 The Dungeon Beneath achievements.
The base game contains 30 achievements, and there are 4 DLC packs containing 9 achievements.
Acquire Iliphar's Arbalest.
Reach Abaddon with Taz'gyn.
Reach Abaddon with no Fighters.
Reach Abaddon with Elder Gryx.
Reach Abaddon in under 60 rounds.
Defeat The Mind Reaver.
Reach Abaddon with Eloa.
Win a battle with only your hero left alive.
Reach Abaddon with Thardoric of the Hammer.
Defeat The Hand of Abaddon.
Defeat Dungeon Boss Firis.
Defeat the Reanimated Colossus.
Defeat Simulae Prime.
Acquire a Searing Sign.
Win a battle in the first round.
Defeat King Fetterbite.
Deal 10 or more damage to a single unit with one attack.
Acquire a Dragon Scale.
Win a battle.
Reach Abaddon with Dominique Boutroux.
Reach Abaddon with Mariana.
Have 10 Armor on a single unit.
Deal 20 or more damage to a single unit with one attack.
Reach Abaddon with no Mages.
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.
Defeat Abaddon.
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.