In the game, players assume the role of investigators exploring a modular map, trying to uncover a secret plot and put a stop to it before it can threaten all of humanity. Unlike the original version, Mansions of Madness Second Edition uses a downloadable app (for use on iOS, Android, Mac, or Windows), to guide the action and control the enemies, eliminating the need for a Keeper player and transforming the game from an overlord-style to a fully cooperative one. The introduction of the app also allows players to approach Mansions of Madness as a solitaire game, and allows the creation of completely random scenarios and maps, offering unlimited replayability. Mansions of Madness Second Edition, however, will not be playable without the app.
The first edition of Mansions of Madness was released in late 2010 (see “‘Mansions of Madness’”).