With over 11 million users and second expansion pack, Wrath of the Lich King, hitting store shelves in a week, it seems as though there is no slowing down for Activision-Blizzard’s cash cow.

While WoW, as it’s commonly called, is certainly the elephant in the room when it comes to MMORPGs, several titles have risen to challenge it. Unfortunately, most have failed, some to the point of no return. Hellgate: London, Age of Conan and Richard Garriott’s Tabula Rasa were all expected to pull in a respectable user base, but to no avail. Hellgate: London and its developer Flagship Studios are all but defunct.Tabula Rasa never caught on, and Age of Conan, which had high popularity when it initally released, has seen such a drop in users that it needed to combine some of its servers just to keep the game active.