IGN spotted a report from the Japanese branch of investment firm Morningstar (link is in Japanese) from last week's Tokyo Game Show, in which a PR rep from publisher Konami said, "Looking forward, we are investigating releasing a 360 version."

The last time the rumor popped up, it was met with stern denial from Konami: "For the record, Metal Gear Solid 4: Guns of the Patriots is a PlayStation 3 exclusive and there are no plans to develop an Xbox 360 version of the game," said a PR rep.

A number of obstacles would theoretically stand in the way of a 360 release, including the sheer size of the game's Blu-Ray disc and its PlayStation 3-specific optimizations. However, during the game's development producer Ryan Payton stopped short of denying that a 360 version was being considered.