"Modern Warfare 3: A Brief Campaign Experience"

Players who had early access to Call of Duty Modern Warfare 3's single-player campaign have reported that it can be completed in 3 to 4 hours, making it one of the shorter campaigns in the mainline Call of Duty series. This is in contrast to last year's Modern Warfare 2 campaign, which took around 8 hours to finish. Some players have criticized the new open-combat missions and the brevity of the campaign. Reports suggest that this year's Call of Duty game was originally planned as a major expansion for Modern Warfare 2 but evolved into a full game.