Ganga,
Check out 'Gunz International:The endless dual' it is pretty high on grfx, completely online based, character cuztamization, you can lvl up and gain monney(bounty) to buy new weapons, clothes, ect.However you better be pretty 1337 to compete with anyone over lvl 11.Oh and did I mention it is 100% FREE! http://www.gunzonline.com