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[[Image:Sega-CD-Model2.jpg|230px]]|caption = Model 1 Sega CD & Model 1 Sega Genesis <br\>Model 2 Sega CD & Model 2 Sega Genesis}}The Sega Mega-CD (メガCD Mega Shī Dī) (released as the Sega CD in North America) is an add-on device for the [[Sega Mega Drive/Genesis]] video game console, designed and produced by Sega. The device adds a CD-ROM drive to the console, allowing the user to play CD-based games and providing additional hardware functionality. It can also play audio CDs and CD+G discs. The first version of the Mega-CD sits underneath the Mega Drive console and loads CDs via a motorized tray. A second version places a top-loading CD-ROM drive to the right of the console and is intended primarily for use with the redesigned Mega Drive II. Both versions of the Mega-CD are compatible with the initial two versions of the Mega Drive console, but not with the Genesis 3. There is also a Mega-CD module, used as an add-on device available for the [[Pioneer LaserActive]] system.