If you haven't played the series before, and you like the idea of the premise, we strongly recommend starting at the beginning with .hack//G.U. vol.1//Rebirth. It would have been nice if all three games had been packaged as one, since they all play like the same game. The same weaknesses are still present, such as repetitive dungeons, stale combat and (cue the classical music) there are plenty of melodramatic cut-scenes. Still, vol. 3 is one of the most original RPGs out there. It may take a bit of imagination and willingness to suspend belief on your part but the premise is fresh and that's worth a lot these days.