Kalawaki, I know you're a faith-driven apologist and all, but do try to understand what people are saying. The motion tracker adds nothing to the experience because the gameplay seldom requires it. Like everything else, it's a novelty item. Try playing one of the AvP games where it's part of the HUD, and you'll see that it's of more persistent use (also having to do with the Aliens trying to stalk instead of rush).