Originally Posted by
Dualage
Phantasy Star Online 2 is pretty damn good.
Though only currently JPN only (after SEGA saying it would launch in the west in early 2013 and no information has been said since), there is a full english patch and a team ready for future updates.
Best way to really get it is using "PSO2 Tweaker". The only difficult part, if anything, is making a SEGA ID account considering it requires Japanese capcha codes.