Battle Of the Immortals is Perfect World Co., Ltd. (NASDAQ: PWRD) first 2.5D mysterious adventure MMORPG. Developed based on their own "Cube" engine. The online game allows players to travel between Eastern and Western cultures, featuring the themes that range from Norse mythology to the history of China's Qin Dynasty. Other highlights of the game include adventures in historic sites, turf wars and a special saint armor system. All of these features cater to players with different interests. Perfect World Co., Ltd. launched Battle of the Immortals in April 2009 in Mainland China.