Based on popular Japanese arcade game, RIO: RAINBOW GATE is set at a big gambling casino on a lavish island resort and follows the exploits of Rio Rollins, a dealer nicknamed The Goddess of Victory, who brings exceptional luck to gamblers with her magical presence. As a"Gate Holder", Rio holds one of 13 mystical cards and must periodically engage in a series of extreme competitions, called Gate Battles, against other Gate Holders to compete for the title of most valuable casino dealers.