Screen Cheat to win Screencheat

http://youtu.be/dOuwoOosYig
From Kotaku:

It’s called, appropriately, Screencheat, which Nathan covered earlier in the year but which I played a bit of over the weekend. It’s a fairly simple multiplayer shooter with a very different twist: everyone is invisible. So you have to look at your opponent’s screen, since that’s the only way you can play the game.