By this point, I’m convinced the Call of Duty series is a sick experiment testing the limits of mass deja vu. Infinity Ward, the makers of Call of Duty 4: Modern Warfare have just announced their new game Call of Duty: Modern Warfare 4. This new game has a linear campaign that sees North Korea bombard South Korean capital Seoul before launching a land invasion of the city. In one strand of the campaign you’ll play as a South Korean…