The Nintendo PlayStation might still be fresh in the minds of gamers, but many have not yet seen this rare prototype from 1998. Development of the format started in 1988, when Nintendo signed a deal with Sony to produce a CD-ROM add-on for the SNES. After several years of development, Sony introduced a standalone console at 1991’s summer Consumer Electronics Show called the “Play Station.” The system was to be compatible with existing SNES titles as well as titles released for the SNES-CD format. However, due to licensing disagreements with Sony, Nintendo announced that it had formed an alliance with Sony’s rival Philips to produce the SNES-CD add-on. Continue reading for more.