Does real life count? I hear it's got over 6 billion subscribers with more every second. But you're only allowed to play it for about 80 years or so before your account deletes itself. Oh, and the graphics are just amazing. The details are stunning, but I'm not sure if I'm such a fan of the high amounts of bloom used and annoying story and gameplay mechanics. And the physics are exactly what you'd want from it, no more no less.