181w ago - Below is a video from GossipGamers.com (linked above) of what appears to be leaked XBox 360 footage of Half-Life 2 being played on Microsoft's upcoming system Project Natal.
It comes courtesy of nutcrackr via YouTube, as it seems someone secretly leaked out the clip.
This is most likely early footage of the beta testing for a FPS game on the Natal and of course, there is no confirmed source where the video came from so take it as you like.
To quote from the video's caption: "Brief clip of Project Natal for Half-Life 2. Situated in Isaac Kleiner's Lab, it shows some movement and turning with hand gestures and also some interaction with the teleporters.