Super Mario 64
Super Mario 64 was made in less than two years, but it was reported that Shigeru Miyamoto had thought about a 3D Mario game, called Super Mario FX, five years before, while working on Star Fox. Miyamoto came up with most of the ideas during the era of the Super Nintendo Entertainment System (SNES) and thought about using the Super FX chip to make it a SNES game, but decided to build it for the Nintendo 64 due to the SNES's technical limitations. On his Twitter Dylan Cuthbert stated that there was never a Super Mario FX game ever made, and that "Super Mario FX" was the internal code name of the FX chip.