As of 2012, the franchise had sold more than 116 million units, making the series the 5th best-selling video game franchise of all time. Games in the series are developed by Sonic Team, with the exception of some spin-offs that were independently developed by Sega of America. The main programmer for the first game was Yuji Naka, who would later become head of the Sonic Team division, and the game planner was Hirokazu Yasuhara but stopped producing games for the franchise. The music of the first two Sonic the Hedgehog games on the Mega Drive/Genesis were composed by Masato Nakamura of the Japanese band Dreams Come True.