Ngmoco has just brought out the ultimate game/tech-demo (to show your friends) for the iPhone 4 -- Eliminate GunRange. It's a virtual gun range game where you use real weapons to shoot targets. The concept is not entirely engrossing as there are plenty of other top-notch shooting games out there (ngmoco's own Eliminate comes to mind). What makes this game fun and special is that it is the first game to take full use of the new iPhone 4 gyroscope. How does it work? Continue reading to find out!