G is a cancelled multi-player hover-bike racer for the original Xbox, in development at FASA Studios (Shadowrun, Crimson Skies) from late 2002 till late 2003. It’s possible that the project was canned because they had to switch time and resources to finish Mechassault 2. Sadly only a video remains from G, preserved below to remember the existence of this interesting game.
Thanks to Foward for the contribution!
Video: