Giant Interactive Group Inc operates and develops online games, primarily its blockbusterMMO ZT Online, in China. Listed on the NYSE in 2007, the company has, as of 2008, a strong presence in 2nd and 3rd tier Chinese cities, large and medium sized cities that aren't one of the top four in terms of population and contribution to GDP. This same year Giant Interactive had the third-largest share of the Chinese online games market with 11.9%, and a BNP Paribas media unit called the company "the industry leader of online games in China." Giant Interactive was founded in 2001 as Shanghai Zhengtu Network Technology Co Ltd.
Some of its games, such as ZT Online, derive revenue from the sale of virtual goods.
The company may be a partner of site 51.com offering casual games.