F-Zero X is a video game for the Nintendo 64 console. The game sold 56,457 copies during its first week of sale in Japan. The North American release of F-Zero X supposedly suffered from a three month delay due to Nintendo of America's then release policy of spacing the release of first-party games out evenly.
F-Zero X is the fourth title in Nintendo's F-Zero series, and the second to be released outside of Japan. Although it failed to match the sales success of the original F-Zero, the Mode 7 Super Nintendo F-Zero game, F-Zero X is the first 3D release and fully polygonal game in the series. The F-Zero X team was made up of several Wave Race 64 key programmers (including the lead programmer).
The Expansion Kit for this game was released nearly two years later in Japan. To leave the field open for future, Nintendo added 64DD features into F-Zero X that would allow for add-on disks such as track editors or course updates. The 64DD was never released outside of Japan, unless imported, these features were never taken advantage of elsewhere in the world.