In FaceOff Paintball you can use your head movements to duck in and out of cover, whilst you pick off the other paintballers. It features a head-driven handy-cam effect to make you feel more immersed in the game and an online leaderboard that updates in-game as you play. The tracking works using a conventional web camera, so there's no need to go and buy any specialised equipment. FaceOff Paintball can be freely downloaded today from: torbensko.com/faceoff

E8S says

9/10 - Agree Disagree

First of all, the overall impression of this mod is very good and clean and combined with stable head tracking it is a hell of a lot of fun to play! Isn't that what it's all about? Second, I could not give 10/10 because the player's weapons are not rendered completely when one turns his head to look around corners/obsticles (Valve never intended to show the player's weapons from the right hand side. This could be easily fixed in an update). All in all, it is a very well made mod with only a few glitches and a very fun one too. The creator showed much creativity in combining a commercial game engine with a customized facial recognition technique.