Call of Duty 4: Modern Warfare - There's no denying that the Call of Duty franchise is ranked amongst the top of first-person shooter games. In this entry to the massively popular series, Call of Duty fans are taken from the grim history of WWII and dropped in the middle of the uneasy political climate of modern times. As a critical and commercial success, Call of Duty 4: Modern Warfare comes with both a rich single-player campaign as well as an amazing multiplayer experience.