1. Call of Duty Home PageOfficial site for the Call of Duty video game series. Includes demos, movies, screenshots, system requirements, and more.www.callofduty.com
2. Wikipedia: Call of DutyUser-created article for the first person shooter video game Call of Duty. Includes game overview, details of multiplayer modes, screenshots, and links.en.wikipedia.org
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7. Call of Duty for PC - GameSpotCall of Duty for PC - GameSpot offers reviews, previews, cheats, and more. Count on us for all of the latest on the Call of Duty Computer Game.www.gamespot.com
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9. Amazon.co.uk: call of dutyA community about call of duty. Tag and discover new products. Share your images and discuss your questions with call of duty experts.www.amazon.co.uk
10. Call of Duty 2 for PC - GameSpotCall of Duty 2 for PC - GameSpot offers reviews, previews, cheats, and more. Count on us for all of the latest on the Call of Duty 2 Computer Game.www.gamespot.com
11. Call of Duty 4: Modern Warfare (PS3): Amazon.co.uk: PC ...Call of Duty 4: Modern Warfare (PS3): Amazon.co.uk: PC & Video Gameswww.amazon.co.uk