Sonic Team has since developed many titles in the franchise. Prominent members of its initial staff included Naka, designer Naoto Ohshima and game planner Hirokazu Yasuhara. Other developers of Sonic games have included the American Sega Technical Institute,
Japanese Dimps, American Backbone Entertainment, Canadian BioWare, British Sumo Digital and British Traveller's Tales. While the first games in the series were platform games, the series has expanded into other genres such as action-adventure, fighting, racing, role-playing, and sports.