CALL OF DUTY MODERN WARFARE XONE. In Call of Duty: Modern Warfare, players will be thrust into an immersive narrative spanning the entire game. Experience the ultimate online playground with classic multiplayer, or squad-up and play cooperatively in a collection of elite operations accessible to all skill levels. In the visceral and dramatic single-player story campaign, Call of Duty: Modern Warfare pushes boundaries and breaks rules the way only Modern Warfare can. Players will engage in breathtaking covert operations alongside a diverse cast of international special forces and freedom fighters throughout iconic European cities and volatile expanses of the Middle East.