The definitive video game emulation case. In the late 1990's, Connectix created the Virtual Game Station, a commercial emulator designed to replicate the Sony Playstation on a PC. In doing so, they necessarily had to copy elements of the Sony BIOS (built-in operating system (the software that runs the Playstation)), but they claimed fair use. The court agreed, noting that law stated that disassembly could be considered fair use when it is the "only way to gain access to the ideas and functional elements embodied in a copyrighted computer program." Since Sony had provided little information about their BIOS to the public, Connectix could only gain access to it by taking it apart. The court also found VGS to be "moderately transformative"; it transfers the Playstation to a new platform, and thereby expresses the product in a different fashion. And since the VGS is transformative, it is not really a replacement for the Playstation. The court also ruled on the claim that Connectix tarnished Sony's Playstation name. Although the VGS does not play games as well as an actual Playstation, the court did not find that this would result in the VGS hurting Playstation's good name

This case follows sound logic, and clearly sets out the argument that emulation itself is perfectly legitimate. It clearly outlines exactly how Connectix copied Sony's BIOS, and explains why that path resulted in VGS being fair use (and in doing so, more or less created guidelines as to how to ensure the legality of an emulator). More importantly, this case made it clear to video game companies that contesting emulation itself would not succeed; if video game companies were intent on stopping piracy, they would have to go after the actual copies of the games, not the emulators. Since ROM files are much more prevalent than emulators, this decision in essence made it much more difficult to stop video game piracy, and forced companies to allow the creation of dozens of free emulators.