   Motion Capture (as seen in Fahrenheit)
  There's just one word I can use to describe it. "Impressive".I watched one of the "Making of Fahrenheit" videos after beating the game, which shows a bit of how it works. It left me wondering though; what sort of hardware and software is required to do this sort of thing? Or basically, how exactly is everything done?   
  Mocap gear works by detecting sensors (usually those ping-pong ball things you see mocap suits studded with) and interpolating their positions from a video camera or other detector system.Sadly, it's still super-proprietary but I'm sure you could build your own with good software and time.   