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For PC gamers, the file size is a slightly more palatable 172GB with the Modern Warfare II campaign and Warzone installed.

CoD MW3 download size: How big is the file? Unsurprisingly, the download size for Modern Warfare 3 is hefty. Anyone looking to pre-load the shooter should expect around 80 to 90GB regardless of platform. Then a further 100-plus GB can be expected once the full game is downloaded in full.