NFSW is an online street-racer in the same vein of other games in the Need for Speed series. When it's not about racing, it's about avoiding the long, wheeled arm of the law. The game purports to be massively multiplayer and open world, and in some sense it is both of those. The world is indeed open, and as you drive through it you'll see a great many players, but that is where the ties to the MMO genre seem to end. The ability for you, the player, to interact with other players in this open world is minimal. You can talk to them, compare your stats, invite them to a match or a group, and that's about it. That would probably be enough under most circumstances, but NFSW is a racing game, and as such has no real cooperative mode, so grouping up becomes pretty much useless.