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Sonic the Hedgehog is released in North America on the Sega Genesis platform, beginning the popular video game franchise.

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Sonic the Hedgehog (1991 video game)
Platform game
Sonic the Hedgehog is a 1991 platform game developed and published by Sega for the Sega Genesis. It was released in PAL regions on June 21, North America two days later on June 23 and in Japan the following month. The player controls Sonic, a hedgehog who can run at supersonic…Source: Wikipedia (CC BY-SA)
Sega Genesis
Home video game console
The Sega Genesis, known as the Mega Drive outside North America, is a 16-bit fourth generation home video game console developed and sold by Sega. It was Sega's third console and the successor to the Master System. Sega released it in 1988 in Japan as the Mega Drive, and in 1989…Source: Wikipedia (CC BY-SA)
Sonic the Hedgehog
Video game and media franchise
Sonic the Hedgehog is a video game series and media franchise created by the Japanese developers Yuji Naka, Naoto Ohshima, and Hirokazu Yasuhara for Sega. The franchise follows Sonic, an anthropomorphic blue hedgehog with super-speed, who battles the evil Doctor Eggman, a mad…Source: Wikipedia (CC BY-SA)
June 23
Day of the year
June 23 is the 174th day of the year in the Gregorian calendar; 191 days remain until the end of the year.Source: Wikipedia (CC BY-SA)