Unlike the previous games, Call of Duty 4: Modern Warfare, is the first game in the Call of Duty series to be shifted away from the World War 2 setting!
Contributed By: 91210user.
Within just two months this became the top-selling game worldwide, selling around seven million copies before 2008.
This was the first game of the Call of Duty series to have a 'Mature' rating.
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