The Lord of the Rings Online is a massively multiplayer online role-playing game (MMORPG) for Microsoft Windows and previously for OS X, set in J. R. R. Tolkien's Middle-earth, taking place during the time period of The Lord of the Rings. Originally developed by Turbine, the game launched in North America, Australia, Japan, and Europe in April 2007 as The Lord of the Rings Online: Shadows of Angmar. Players could create characters of four races and seven classes and adventure throughout the region of Eriador. In November 2008, the Mines of Moria expansion was released, adding the region of Moria and two new playable classes. It was followed by the Siege of Mirkwood in December 2009. In 2010 the game underwent a shift from its original subscription-based payment model to being free-to-play.