The Lord of the Rings Online: Shadows of Angmar (commonly abbreviated as LOTRO) is a free-to-play PC video game characterized by the genre commonly referred to as massively multiplayer online role-playing game or MMO. It is set in a fictional fantasy universe created by J. R. R. Tolkien named Middle-earth , during the time-period of The Lord of the Rings. It is based on information from J.R.R Tolkien's The Lord of the Rings novels; as such, it deviates in small ways from Peter Jackson's The Lord of the Rings movie series (although some of the imagery in the game compares favorably to those movies). The Lord of the Rings Online: Shadows of Angmar was developed by Turbine, Inc but is now subsidiry of Warner Bros. Entertainment and is a free to play based game which requires a connection to the Internet. Extra items can be purchased online at The Lord of the Rings Online store. It launched in the United States and Europe on April 24, 2007. The game is currently available on both Windows and Macintosh-based operating systems. The first expansion pack, Mines of Moria, was released in Autumn 2008. The Siege of Mirkwood expansion was released on December 1, 2009. The third expansion , Rise of Isengard , was released in late September 2011. The fourth expansion , Riders of Rohan , was released on October 15th, 2012.