Kotaku is a game site from the Gawker Media stable. A few days ago while browsing Kotaku I came across this item: GPS Tron. A guy in Germany has written software that lets two people play a real world version of the light cycle game from the movie Tron. The object of the game is to move around a two-dimensional grid leaving a trail behind you that can’t be crossed. Eventually you or your opponent will crash into the boundary wall or one of the trails left behind by your light cycles. And now through the magic of cell phones and cheap GPS receivers, you and a friend can play this game by driving around in real cars. I’m not sure how they enforce the constant speed rule, but still, it’s a pretty cool idea.