Play U-BOOT in a bigger surface. Each pack includes an eco–leather mat with foam bottom, waterproof and scratch resistant, 2 mm thick, rollable, foldable, and anti–allergic. U-BOOT: The Board Game is a real-time tabletop game of WW2 submarine warfare. An underwater cooperative war thriller that allows 1 to 4 players to assume the roles of the Captain, the First Officer, the Navigator, and the Chief Engineer on board of a type VIIC U-boat. The game is enhanced by a companion app, allowing for an unprecedented level of realism, as well as a challenging enemy A.I. to push your skills to the limit.