Changyou.com Limited develops and operates online games in the People’s Republic of China. It is primarily involved in the development, operation, and licensing of massively multi-player online games, which are interactive online games that might be played simultaneously by various game players; Web-based games, which are played over the Internet using a Web browser; and mobile games that are played on mobile devices and require an Internet connection. The company also owns and operates Web properties and software applications for PCs and mobile devices, including the 17173.com Website, an information portals for game players in China; the wan.com Website, a games portal that provides a collection of Web games of third-party developers to game players; RaidCall, which provides online music and entertainment services, primarily in Taiwan; and the Dolphin Browser, a gateway to a host of user activities on mobile devices, with its users in Europe, Russia, and Japan. As of December 31, 2014, it had approximately 25 million total average monthly active accounts; and 3.4 million total average monthly active paying accounts. The company was founded in 2003 and is based in Beijing, the People’s Republic of China. Changyou.com Limited is a subsidiary of Sohu.com Inc.