What is "snes-cd"

The Super NES CD-ROM (also known as SNES-CD or Super Disc) refers to an unreleased video game media format and peripheral for the Super Nintendo Entertainment System (SNES). The device and the format were to build upon the functionality of the cartridge-based SNES by adding support for higher capacity compact discs.

The SNES-CD platform was developed in a partnership between Nintendo and Sony. The platform was planned to be launched as an add-on for the standard Super NES, as well as a stand-alone hybrid console by Sony called the Play Station. Another partnership with Philips yielded some poorly received Nintendo-themed games for the CD-i platform instead of the SNES-CD. Sony independently furthered its developments into its own console, which resulted in the release of the original PlayStation, a chief competitor of the Super NES's cartridge-based successor, the Nintendo 64.