About The Game Call of Duty 4: Modern Warfare is a first-person shooter video game developed by Infinity Ward and published by Activision . The fourth installment in the Call of Duty series , it was released in 2007 for the PlayStation 3 , Xbox 360 , and Microsoft Windows . The game breaks away from the World War II setting of previous entries in the series and is instead set in modern times. Developed for over two years, the game uses a proprietary game engine . The story takes place in the year 2011, where a radical leader has executed the president of an unnamed country in the Middle East, and an ultranationalist movement ignites a civil war in Russia. The conflicts are seen from the perspectives of a U.S. Force Reconnaissance Marine and a British SAS commando , and are set in various locales, such as the United Kingdom, the Middle East, Azerbaijan, Rus...