There is a distinction between "Highly Compressed" scams and "Repacks." Repacks (popularized by groups like FitGirl or DODI) are legitimate methods of compressing games.
The search for " Call of Duty: Modern Warfare 2 highly compressed PC download" often leads to websites promising the full game in an impossibly small file size, sometimes as low as for a game that originally requires roughly 12 GB (2009 version) or over 125 GB (2022 version) . While the concept of high compression is appealing for those with limited data or slow internet, it is critical to distinguish between legitimate repacks and deceptive, potentially harmful downloads. The Reality of Highly Compressed Game Files
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The system requirements vary greatly between these versions. Here is a comparison for the 2009 and 2022 games.