GestureTek's Interactive game's.

Controle the action by moving your head
"Video gesture control pioneer GestureTek., unveiled its new Momo™ Software Development Kit for game developers and original equipment manufacturers at the 2010 Consumer Electronics Show. Gesture recognition software tracks motion and objects such as faces and hands and brings immersive, gesture-based interactivity to multiple platforms, such as PCs, laptops, mobile phones, toys and other devices. The video is a demonstration of a head-butting soccer game."