This is a map of everywhere I've been for nearly the last year. Everywhere. I didn't carry around a special tracking device. The FBI isn't sending goons in unmarked vans to track me. All I did was use an iPhone. And if you have an iPhone, you're being tracked right now, too, whether you like it or not.
Let's get physical, or more specifically, let's get biometrical, as Valve's Gabe Newell, Erik Johnson and Doug Lombardi talk to PC Gamer about using players' intrinsic physical reactions to playing video games.