This article is about a subject in the real world.
Information in this article is about real-life people, companies, and objects, and does not relate to the in-universe Sonic series.

The Sega CD is a video game console add-on for the existing Sega Mega Drive. It was originally released as Mega-CD. It allows users to play CD-ROM games.

Sonic the Hedgehog CD was exclusively released for the Mega-CD, although it has since been released as part of compilation games for PCs. The Mega-CD has many other games, such as the controversial Night Trap and Time Gal video games.

Sega also released a combined, semi-portable Genesis/Sega CD unit called the Sega Genesis CDX (Sega Multi-Mega in Japan and Europe). This unit retailed at a lower price than the individual Genesis and Sega CD units put together, but is incompatible with some games and cannot work with the Sega 32X due to overheating and electrical shock issues. The CDX features a small LCD screen that, when the unit is used to play audio CDs, displays the current track being played.

Characters Introduced


Sega CDX

Sega CDX

  • Sega CDX -  a combined, semi-portable Genesis/Sega CD unit called the Genesis CDX (Multi-Mega in Europe) bundled with Sonic CDSega Classics Arcade Collection, and the Sega CD version of Ecco the Dolphin.

Original release dates

  • Japan - 12 December 1991 (As Mega-CD)
  • North America - 15 October 1992
  • PAL region - April 1993



Sega CD Logo

  • Sega CD games are region-locked. The region can be changed when making CD-R copies but it's not always possible.
  • There are 220 games released for the Sega CD.
  • There are six titles that were also released in formats that used a combination of the Sega CD and the Sega 32X.