"highly compressed" to , it is important to understand that these files are not the actual game. The Reality of "20 MB Highly Compressed" Files
Standard high-end compression tools like or WinRAR can typically reduce game files by 30% to 50%. Even extreme "repackers" (like FitGirl or CorePack), who use specialized algorithms to strip out multi-language files and lossy-compress textures, rarely manage to shrink a 15 GB game below 5 GB to 7 GB . Compressing 15,000 MB of data into 20 MB would require a compression ratio of 750:1 , which is mathematically impossible for functional software data. The Anatomy of the "20 MB" Myth Medal Of Honor Warfighter Highly Compressed 20 Mb