Arcade Reality for iPhone

From Chillingo Ltd:

In Arcade Reality for iPhone, alien invaders from space fly around your body in real-time, their laser beams and missiles attacking from every angle. The attackers are invisible to the human eye, but unbelievably they are now visible via the camera on your iPhone. Skillful players can unlock devastating power-ups, intense bonus levels, and fearsome alien bosses. it features shoot aliens against a backdrop of the environment around you, via the iPhone, multiple game modes and bonus levels including arcade reality, infinite, and asteroid attack, sound effects and music bring you closer to the action than ever before as you battle aliens face-to-face, many types of alien enemy with numerous attacks and moves, and visit and even post your score to the hall of fame, and see how you compare to the best players around the world.