Call of Duty Modern Warfare 3Call of Duty: Modern Warfare 3 is the 2011 release in the best selling Call of Duty First Person Shooter action series. The game is a direct sequel to the previous game in the series, Call of Duty: Modern Warfare 2, with a campaign storyline continuing the struggle of U. S. forces against an invasion by the Russian Federation following the framing of an undercover U. S. agent in a terrorist attack on Moscow. Along with classic Call of Duty multi