Speaking with Japanese weekly Famitsu (thanks 1UP), veteran game designer has said that Metal Gear Solid: Peace Walker could push of the Go for Sony.

"I'm putting everything I want to do on a portable console into this game. I haven't announced this yet, but there's another feature in here that will surprise people, to the point where they'll want to go out and buy a PSP right now!" the exec enthuses.

It is unclear what this secret feature could be, but we're assuming it's something linked to or perhaps - taking advantage of the system's unique capabilities.

We'll have more Peace Walker news as soon as possible.

By Luke Guttridge