This is rather clever by interaction designer David ARENOU - with a wii remote & your consoles camera you set up your room & the elements your going to use for duck 'n' cover (uses AR tags) & you are then in your own FPS game - is a prototype at the moment, read more here http://portfolio.davidarenou.com/video-game/immersive-rail-shooter/
"Immersive Rail Shooter, or IRS reformulates virtual elements of shooter video games and gives to physical objects a tangible interface dimension. Between augmented virtuality and mixed reality, IRS uses the space as playground and engages the player body in an intense rail shooter game."