Porsche Cars USA is launching a social media game together with FourSquare. The game involves spotting a Porsche in Dallas during the NFL game between Pittsburgh Steelers and Green Bay Packers, and updating the location of that Porsche with its photo on FourSquare.

Porsche wants to create a real-time photo gallery of Porsche cars on FourSquare at the best hangouts and landmarks in Dallas. According to the press release issued by Porsche:

Porsche is turning every square inch of Dallas into a playing field and everyone in town for the big showdown is invited to participate.  The challenge is to help Porsche create a real-time online photo gallery using the Foursquare’s social media application and snapshots of Porsche vehicles at the Big D’s best hangouts and landmarks.

Once a Porsche is spotted a user would have to take a snapshot of the Porsche in the foreground and upload it to FourSquare with the hashtag “#Porsche”.

So what do the users get in return ? Porsche will be featuring the best photos in its “Porsche spotting at the big game” photo gallery on Facebook. Not a bad reward, but a free Porsche for the winner of the contest would have been an even better prize.