Gravity One is a cancelled third person shooter that was in development by Kawaii Studio and Widescreen Games (mostly known for Dead to Rights II and the cancelled The Witcher: Rise of the White Wolf) around 2003 / 2006, initially planned to be released for PS2 and later for Xbox 360. The project was never officially announced by Kawaii / Widescreen, but some footage is preserved below to remember its existence.
As far as we know Gravity One was going to be a linear third person shooter, with an original twist: the game was set in some kind of space-station, so you could be able to fly around in zero-gravity rooms. This means you had to shoot down enemies while moving around in all directions, using boxes and other parts of the scenario as flying-covers or weapons. The project was still in early development while Kawaii Studio pitched it around to different publishers: it’s possible they would have added more mechanics to it, if only they had found support.
It seems Gravity One was initially conceived as a Playstation 2 game, but with time passing without finding a publisher, the team switched the project to the soon-to-be-released Xbox 360 console. Even if Microsoft’s Xbox 360 market was quite perfect for third-person shooters, Gravity One was quietly cancelled.
In the end Kawaii Studio never released any game: their second know prototype titled “Ghostman” was also canned. Kawaii Studio seems to have been fully merged or acquired by Widescreen Games in 2006, possibly to help them with other major projects, such as their cancelled “The Witcher” console port.