Sonic the Hedgehog CD, or simply Sonic CD, is a platform game and the 3rd installment in the Sonic the Hedgehog series. It marked the first official appearance of the characters Metal Sonic and Amy Rose. It was released for the Mega-CD in Japan on September 23, 1993, in Europe in October 1993, and finally in North America for the Sega CD (the North American name for the Mega-CD) on November 19, 1993. The game was ported to PC CD-ROM in 1996.
