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Single-Player | Polled | Average |
Main Story | 214 | 8h 8m |
Main + Extras | 33 | 10h 18m |
Completionist | 19 | 10h 19m |
All PlayStyles | 266 | 8h 34m |
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.