The MW2 install size is different on all platforms, but they are still very large file sizes, coming in at well over 80 GB at the least. Some of the platforms have split aspects of the game into different downloads, such as the base game, and then the campaign on its own, and that's all with a day-one patch thrown on top.
Here are the Call of Duty: Modern Warfare 3 System Requirements (Minimum) CPU: Intel® Core™ 2 Duo E6600 or AMD Phenom™ X3 8750 processor or better. CPU SPEED: Info. RAM: 2 GB. VIDEO CARD: Shader 3.0 or better 256 MB NVIDIA GeForce 8600GT / ATI® Radeon X1950 or better. DEDICATED VIDEO RAM: 256 MB. Let's find out the Modern Warfare 3 game file sizes across different platforms: PS5: 90 GB; PS4: 90 GB; Xbox Series X|S: 88 GB; Xbox One: 88 GB; PC (Steam): 90 GB; PC (Battle.net): 90 GB; So far, the update sizes are also very small compared to Modern Warfare (2019). . 78 605 221 679 109 585 516 336