June 23:Sonic The Hedgehog on the Sega Genesis game system is released in the USA.
June:Sonic the Hedgehog on the Sega Mega Drive is released in Europe.
July 26:Sonic The Hedgehog on the Sega Mega Drive is released in Japan.
October 25:Sonic The Hedgehog on the Sega Master System is released in Latin America.
December 28:Sonic The Hedgehog on the Sega Game Gear is released in Japan.
