Wie beim großen Vorbild "Dungeon Keeper" soll man ein Dungeon - mit allerlei Räumen - unter der Erde aufbauen können. Dann trainiert man zahlreiche Kreaturen und lässt sie Kämpfe in Echtzeit ausfechten. Schreine, Rituale, Fallen, Sprüche, Schätze und Co. soll es ebenfalls geben. Als Spielmodi sind eine Singleplayer-Kampagne, ein Mehrspieler-Modus und ein Sandkasten geplant.
"After our campaign ends, all supporters will be able to vote on which features they want added to the game through our backer-exclusive website. These features are extensions and will be developed after the base game has been completed. (...)
- Matchmaking & Ranking: We will implement more advanced skirmish matchmaking, ranked ladders, and player statistics for a fully featured and competitive multiplayer experience.
- 2 Lords 1 Dungeon: Two Underlords will be able to cooperate in the same Dungeon.
- Controller Interface: We will develop a controller friendly interface which will allow us to support Ouya & Steam Big Picture, and possibly the Xbox Live Arcade & PlayStation Network.
- Hero Mode: Control an advanced hero (additional spells and leveling system) in a dynamically changing dungeon crawler.
- Extended Underlord Campaign: We will add additional chapters to the Underlord campaign.
- Empire Campaign: Play as the Empire and battle a series of Underlords in a full-length campaign.
- Co-op Campaign: Team up and take on the Empire with your friends in a specially designed campaign chapter.
- Competitive Campaign: Assume the role of an Underlord or the Empire and fight one another in a full-length versus campaign chapter.
- Arcade Campaign: The moderately insane Underlord Eccentrious has given you some...interesting tasks in order to gain his favour including Golf, Dodgeball, Whack-A-Dwarf, Tag & more.
- The Adventures of Stumpy the Imp: Take control of Stumpy the Imp as he ventures through a full-length first person campaign throughout the Underworld.
- Survival Mode: A co-op survival mode where you and your friends must build an impenetrable fortress to fend off ever increasingly difficult waves of enemies - who can survive the longest against this onslaught?
- Underworld MOBA: A MOBA multiplayer map with advanced versions of our units enhanced for an action packed experience."