SNES CD
The SNES-CD (aka Super NES CD-ROM System or Super Disc) is an unreleased video game system developed as a join venture between Sony and Nintendo. The main goal of the system seems to have been to supplement the SNES system with larger disc-based storage capacity. The original development plan was to create an add-on peripheral for the SNES as well as a combined system called the Play Station that would also be capable of playing cartridge or disc-based games.
After the deal between Nintendo and Sony fell through, Sony continued its development of the disc-based game console that eventually became the Sony PlayStation. Nintendo went on to work with Philips to develop a disc add-on, which resulted in no peripheral or prototype. Due to the contract, Philips developed some Nintendo-themed games for its CD-i system that were generally considered commercial failures. For its next system, Nintendo would work with SGI to develop the Nintendo 64, an exclusively cartridge-based console.