Vortex Basic Vortex is the fun board game to play with family and friends. Place the routers and the controllers and try to be the first to get to the other side of the board. The basic game (Crossing and the variant Crossing Advanced) can be played by 2 to 6 players. For younger players (6 years and older) Cat & Mouse is the perfect game. When you prefer to play single, you will find solitary quite challenging.