a missionary from my church once told me that only half of dozen single-player pc games got published in china every year and most of them is either from japan or homemade jrpg. so you can only buy all-new second-hand games from homeland ebay-like platforms and get screwed by dlc schemes e.g. batman arkham city, or buy from digitial distributors when concerned publishers don't enforce regional restriction (whose number grow considerably, including last year sega, 2K, batman arkham city and now even kingdoms of amalur).
in similar way, you can only buy smuggled xbox or ps since sony's scheme of disgusing ps3 as multimedia product failed under the scrunity of the keen eyes of chinese officials and businessmen. nintendo broke through the barrier by using a front company registered in china and sponsored by abc organization from america. but only a dozen of games released on respective platform.
one reason is that china has become the paradise of mmo, especially so-called free ones. south korean and russian have realized this truth. if china takes over world games industry, only indie single-player games have the inherent ability to survive.
another reason is the games are considered as a cultural weapon similar to movies.