The fast-paced game development process today means that many prototypes are made and discarded but that has actually been true even in ages past. While most prototypes never make it outside NDA’d halls, some do make a pubic appearance. So when something as high-profile as Simcity for the Nintendo Entertainment System, a.k.a. Famicom in Japan, vanishes without a trace, gaming historians are naturally intrigued. After 27 years, their sleuthing has finally paid off and SimCity for the NES has reemerged and is now available for everyone to learn from.