How Long Does It Take To Complete? The main story of Call of Duty: Modern Warfare 3 lasts around five hours, according to HowLongToBeat. However, you have to be solely focused on the story or just really good to beat it in that time. If you go for some of the achievements as well, then it will take around seven hours.

Despite setbacks and negative headlines, Call of Duty: Modern Warfare 3 is breaking player engagement records and racking up record hours of gameplay. The campaign of Modern Warfare 3 initially disappointed players, but the online multiplayer has been a success, contributing to the game's overall success.