List of Sonic the Hedgehog video games
"Sonic the Hedgehog" is a video game series. It is published by Sega, with entries developed by Sega, Sonic Team, Dimps, SIMS Co., Ltd., BioWare, and Sumo Digital. The series debuted in 1991 with the video game, "Sonic the Hedgehog", released for the Mega Drive video game console (named Genesis in North America). Most "Sonic the Hedgehog" games have either been platform games or released for Sega video game consoles and handheld game consoles (handhelds) dating from the Genesis to the eighth generation of video game consoles (2012–present). However, some of the original games were ported into versions on third-party home consoles and developed by several companies. As of February 2013, the series has collectively sold over 85 million copies worldwide across both the platform games and spin-offs.
Sonic CD
The 1991 release of "Sonic the Hedgehog", the first game in the "Sonic" series, was a major commercial success and positioned Sega as Nintendo's main rival in the console market. Lead programmer Yuji Naka, dissatisfied with Sega of Japan's rigid corporate policies, moved with several members of Sonic Team to the United States to develop "Sonic the Hedgehog 2" with Sega Technical Institute (STI). Meanwhile, Sega planned to release the Sega CD add-on for its Genesis, and wanted a "Sonic" sequel that would demonstrate its more advanced features. Sonic's character designer Naoto Ohshima was "Sonic CD"s director; the remainder of the team comprised Sega staff who had developed "The Revenge of Shinobi", "Golden Axe 2", and "Streets of Rage".