CrossFire or Cross Fire (CF) is a South Korean made tactical first-person shooter online PC game developed by South Korean FPS developing groups SmileGate and Neowiz. The game was released in China by Tencent, with Tencent as the exclusive agent service company. Tencent operates the game through the Internet, with service areas covered and the networks supported by China Telecom and China Netcom. The tests for its software bugs were started publicly in April 2008.