The Sega Mega-CD, also referred to as the Sega CD, was an add-on for the Sega Genesis online game console that allowed customers to play CD-ROM video games. It was launched in 1991 and featured quite a few standard titles, together with Sonic CD, Remaining Fantasy VI, and Ecco the Dolphin.
The Mega-CD was a industrial success, promoting over 10 million items worldwide. It helped to popularize the usage of CD-ROM know-how in video video games and paved the way in which for the Sega Saturn, which was launched in 1994.