It ammuses me how propel keep calling this fame out as being a "clone". Ghost Recon did the modern shooter befor CoD4, does tht make it a clone? Medal of Honor did WW2 ges before Call of Duty, but do they copy? Marathon did space shooters before Halo. There is a limited pool of ideas oft games that people will buy. Chance are somewhere, someone already made a ge similar to another. Similarities don't make a game a "clone".