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Files named exactly like this are often found on third-party "abandonware" or repack sites. Because they are executable archives, they are a common delivery method for malware or unwanted "adware" installers.
Compression makes the 10GB+ game easier to host and download. Prototype 2.part2.rar
This is the second segment of a multi-part compressed archive. To extract the game, you typically need all parts (part1, part2, part3, etc.) in the same folder. Files named exactly like this are often found
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