Mansions of Madness Second Edition is a fully cooperative horror board game for one to five players. The game features a companion app that guides players through scenarios, adding depth to the storytelling and gameplay. It includes four campaigns of different lengths and difficulty levels, set in locations like Innsmouth and Arkham. The game comes with over 500 components, including 32 plastic figures, designed for immersive puzzle-solving and encounters. A conversion kit is included for integrating components from the first edition.