[4] The other device was to be stand-alone console developed by Sony called the PlayStation would use their own CD-ROM format known as the "Super Disc" and would include compatibility with SNES cartridges.

[citation needed] The project moved to a 32-bit system and specifications were completed near end 1992,[4] but by the summer of 1993, Nintendo quietly canceled the addon entirely.

Nintendo disagreed, believing that CD-ROMs were too slow, but agreed to allow Sony to design the add-on after Kutaragi claimed the drive would be used for everything but games.

To counter the proposed agreement, Yamauchi sent Nintendo of America president Minoru Arakawa and executive Howard Lincoln to the Netherlands to negotiate a more favorable contract with Philips.

As David Sheff said in his book Game Over, "[The Philips deal] was meant to do two things at once: give Nintendo back its stranglehold on software and gracefully f--k Sony.

"[11] At the June 1991 Consumer Electronics Show, Sony announced its SNES-compatible console based on both cartridge and CD, called the PlayStation.

[19] In March 2016, retro-gaming website RetroCollect reported that it (and influential members of online emulation communities) had received (from an anonymous source) a functional disc boot ROM for the SNES CD.

[21] Heckendorn later identified faults in several on-board components which he subsequently replaced in 2017, resulting in fixing the audio and CD drive issues indirectly.

[29] The specifications of the prototype are different from that of the proposed add-on by Philips, which were published in the March 1993 edition of Electronic Gaming Monthly (EGM).

This contract provisioned Philips with the right to feature Nintendo's characters in a few games for its CD-i multimedia device, but never resulted in a CD-ROM add-on for the SNES.

Sony would pursue their ambitions to launch their own video game console and continued to develop the PlayStation, dropping compatibility with the SNES.

Sony entered a short-lived alliance with Sega, where it was agreed that both companies would share all costs and risk for the new CD-ROM drive, and ultimately the next generation console.

The main game in development for the SNES CD platform launch was Square's Secret of Mana, whose planned content was cut down to the size suitable for cartridge and released on that medium instead.

[34][15] Nintendo, still convinced of the faster load times and stronger anti-piracy of the cartridge, did not release an optical disc-based console until the GameCube in 2001.