If an ESRB listing is to be believed, Koei's futuristic combat racer, Fatal Inertia, could eventually return to its point of origin. Starting life as a PlayStation 3 exclusive, the game was eventually met with a lukewarm reception on the Xbox 360 in 2007. Prospects of a PS3 release were temporarily wipEd out after Koei delayed it "indefinitely" due to Unreal Engine 3 issues.

The mention of "Fatal Inertia EX" for PS3 may signal an end to these issues and hint at the arrival of an updated, possibly more EXTREME version of Koei's non-dynastic hoverfest. Our requests for information from the publisher have thus far crashed and burned.

Though the distinct lack of dynastically-inclined warriors may convince you otherwise, futuristic racer Fatal Inertia is indeed a product of Koei. The first game from the company's Toronto-based studio has now been assigned a release date on half of its originally intended platforms, with the Xbox 360 version arriving on 11 September 2007. The PS3 version, unfortunately, received no such date and has been "delayed indefinitely."

The game's unfortunate status, as conveyed to Joystiq by a Koei representative, is as a result of developers awaiting completion of the game engine for the PS3 platform specifically. Fatal Inertia is built using Epic's Unreal 3.0 engine, which debuted on Xbox 360 last year in testosterone vs. chainsaw epic, Gears of War, and was more recently seen on PS3 with Tom Clancy's Rainbow Six: Vegas. Koei explained that the game had not been canceled outright, but offered that progress on the PS3 engine was "out of our hands."

We next talked to Epic's VP Mark Rein, who thought that the Unreal 3.0 engine was incomplete only in the sense that it's constantly being upgraded. "Unreal Engine 3.0 is running quite well on PS3 and people will have the chance to see that when we show Unreal Tournament 3 next week."

Two of Koei's most notable PS3 games (particularly notable for not being Dynasty Warriors) have been delayed in Europe until Summer 2007. The developer has opted to miss out on the Euro PS3 launch, instead spending some more time on polishing futuristic racer, Fatal Inertia, and non-futuristic hack 'n slasher, Bladestorm: The Hundred Years' War.

No indication was given whether the delay affects the Xbox 360 versions.