Take on the world as both a U.S. Marine and a British S.A.S. Soldier in Call of Duty 4. You'll travel across the globe, relying on your wits and weapons to launch all-out assaults and accomplish invisible missions of stealth. Day or night, be ready to do what must be done. It's the most up-to-date collection of firepower, machinery and military vehicles in the Call of Duty series. Prepare to experience the sophisticated technology and unbelievable graphics of an incredibly realistic warfare experience.