Sega CD
The Sega CD is a CD-ROM accessory for the Mega DriveGenesis. It was released on December 12, 1991 in Japan, October 15, 1992 in North America, and April 2, 1993 in Europe. 2.24 million Sega CD units were sold by March 1996, after which Sega discontinued the system to focus on the Sega Saturn.