Potato chips and videogames, a match made in heaven (or perhaps just on the couch), at least that's what Microsoft and Doritos reckon, as the two team up to offer one lucky gamer the chance to have their game concept for an Xbox Live Arcade title turned into a reality.

The competition, entitled 'Unlock Xbox. You Dream it. We Build it.' has just one catch however: each submission must be a title centred around the Doritos brand. Entrants may use images or videos to support their groundbreaking snack-based videogame and will no doubt be inspired by, as Doritos puts it: "our iconic shape, bold flavours or simply our intense experience." (Yeah, every bag of Doritos I've had has been "intense"! - Ed).

"Doritos fans continue to tell us how excited they are to be part of, and personalise, what is important to them," claims Frito-Lay marketing lady Ann Mukherjee. "We hope 'Unlock Xbox' gives people a chance to express their own creativity, this time in the innovative world of gaming."

The winner will be decided through a community voting process, with the eventual winner's idea appearing as a full, free download in summer 2008.

Visit the official Unlock Xbox site for more details and then get munching! We mean, erm, thinking?