The Sega CD was released on December 12, 1991 in Japan, October 15, 1992 in North America, and April 2, 1993 in Europe. The Sega CD plays CD-based games and adds hardware functionality such as a faster CPU and graphic enhancements such as sprite scaling and rotation. It can also play audio CDs and CD+G discs. The Sega CD can only be used in conjunction with a Genesis system, attaching through an expansion slot on the side of the main console. The Sega CD supports a library of over 200 games created by Sega and third-party publishers. Included in this library are six games which, while receiving individual Sega CD releases, also received separate versions that used both the Sega CD and 32X add-ons.