Perfect World Co., Ltd. is a holding company. The Company, through its subsidiaries, develops and operates online games. It operates in two segments: PRC operations and International operations. The PRC operating segment includes PRC online game business. The International operating segment includes United States online game business, Runic Games and Unknown Worlds. Its portfolio of self-developed online games includes massively multiplayer online role playing games (MMORPGs): Perfect World, Legend of Martial Arts, Perfect World II, Zhu Xian, Chi Bi, Pocketpet Journey West, Battle of the Immortals, Fantasy Zhu Xian, Forsaken World, Empire of the Immortals, Return of the Condor Heroes and Legend of the Condor Heroes, among others. It also offers Web and mobile games, such as Return of the Condor Heroes, Forsaken World, CrossGate Mobile, Forever Mars, Dawn after Dark and Swordsman Mobile. It operates its games in North America, Europe, Japan, Korea and Southeast Asia.