In the game, players build dungeons containing deadly traps to kill adventuring heroes that enter.

[3] The "mad god" Mendechaus (voiced by fourth wall breaking narrator Richard Ridings) restores underlord Oberon and orders them to invade the underworld of the empire of Kairos, a realm protected by the goddess Kira.

Kira, who has previously played a role in the apparent betrayals of several underlords before, saves Oberon from destruction, addressing them as Overseer.

In the game, players assume the role of an Underlord tasked with building dungeons that contain deadly traps and enemies to kill wandering heroes.

[4] The game starts with a blank slate and lets players choose where to "dig, fortify, and build" to create their dungeon.

[4] The game is played in real time, with the player actively making decisions while fighting occurs.

[5] Taking its name from the subtitle of the defunct Dungeon Keeper 3, the game went through several incarnations, starting with a version based on a custom OpenGL engine, and later Unreal Development Kit,[6] it was announced in November 2011 that a decision had been made to leave the Dungeon Keeper IP[7] and the team finally settled on using the Unity Engine, announcing the change in June 2012.

[14] Further pledges via PayPal increased the amount to over £225,000 on January 6, 2013 securing the first flex goal of Richard Ridings as narrator.

[18] This resulted in the development team working extreme hours to release a series of patches over the following weeks and months.