Heroes of Three Kingdoms (simplified Chinese: 赤壁Online; traditional Chinese: 決戰！真三國) (also known as Chi Bi or Red Cliff in China, and Legend of 3 Kingdoms in Indonesia) is a massively multiplayer online role-playing game set in ancient China during the fall of the Han Dynasty. The game, developed by Perfect World, offers free-to-play, no subscription-based game play, and entered Open Beta status on October 16, 2009. The North American version, entitled Heroes of Three Kingdoms, was announced on April 12, 2010 by Perfect World Entertainment, the US subsidiary of Perfect World Co. Heroes of Three Kingdoms entered Closed Beta on July 13, 2010.