Joystiq
Joystiq News

If you're hankering for something to spice up after months of playing, getting a is probably your best bet. The Swedish company's devices are now with the PC version of the title, which means the Tom Clancy game gets a bunch of cool, new eye-tracking features. What's perhaps the neatest of them all is the ability to tag or mark an enemy just by looking at them, so your team can see and shoot him. That's more efficient than, say, Battlefield's multiplayer system, wherein you'd have to tap another key to tag an opponent.
Source:
Console Bang News!