Massively Multiplayer Online Role-Playing Game. Originally dubbed Middle-Earth Online. Based on the books. In the first, we followed the Fellowship of the Ring up to the gates of Moria. In the first expansion, The Mines of Moria, we journeyed into the Dwarrowdelf and beyond in the wake of the Fellowship. In the second expansion, Siege of Mirkwood, we're journeying north into the realm of Thranduil. The third Expansion, Rise of Isengard, pitted us against the forces of Saruman. The fourth Expansion, Riders of Rohan, brings us into the land of the Horse-lords proper.