Yeah I get that you can play this on your own if you want, but the one of the main things that a lot of people have been trying out with next gen is destroying the line between single player and multiplayer by having seamless transitions. Like from the sounds of it, even if you're playing alone, its not like you're going to be the only person in that world. There will be other people doing their own thing and they may possibly decide to join you, or you can decide to join them. But then again, this is billed as an online, open world RPG, so I'd imagine that you can't play it offline.