Parker, an American marine that is in the levels " First to Fight", " Exodus", " On Approach", " House Cleaning", " Missile Away", and " Dead in Ten".These are the playable characters in Call of Duty 4 DS: The DS version focuses less on the main attempts to end the conflict and more on the supporting role of the various other soldiers who played a part in the war. Instead of going after the main antagonists of the overall plot (even though they are mentioned) (the Four Horsemen: Russian Ultranationalist Imran Zakhaev and his allies), the playable characters in the DS version participate in minor missions, such as escaping from an American army base in the Middle East as it is attacked by enemy forces, or raiding two cargo ships in the stormy black and dark Baltic Sea which may be carrying nuclear materials.
Unlike the console and PC version of Call of Duty 4, players do not directly impact the outcome of the war. The DS version of the game allows the player to assume the roles of several anonymous soldiers, who are either affiliated with the British S.A.S. The game features many elements of gameplay typical to the series. Like Call of Duty 4: Modern Warfare for traditional consoles, the DS version takes place in modern day and offers players real-life weapons. Call of Duty 4: Modern Warfare is a game in the Call of Duty series franchise, developed specifically for the Nintendo DS.