GunBeat (also known as Glitter GunBeat) was an action/racing game created by Treasure for the Sega NAOMI arcade hardware in 1999. It was location-tested publicly, but canceled before its release. A few videos and images remain the only reliable sources of information about the game.
The game, which would have been Treasure’s first fully 3D title, appeared to have players race each other around circuitous tracks riding mounts, including a giant hamster. The game had action and combat elements, as well.
Production was terminated when the lead programmer left the company. This programmer has not been identified by name, but founding member “Fukuryu” is known to have left the company around this same time, and remains the best guess of fans. Treasure was not initially pleased with game’s progress and chose to end the project rather than attempt to replace the project leader. [Infos from Wikipedia]