When you first enter Moria, the famous dwarven depths, an imposing stairway of 1,001 rocky steps greets you. It's an indelible moment for Tolkien fans, but more importantly, it sets the stage for this curiously murky, moody expansion pack to last year's massively multiplayer The Lord of the Rings Online: Shadows of Angmar. With Mines of Moria, developer Turbine pulls off quite a feat: they make the tight labyrinths and cavernous halls of the mithril mines even more compelling to explore than the rolling hills of Middle-earth.