This indicates the files have been compressed and "repackaged" to make the download size smaller than the original retail version.
Understanding the Archive: What is TEKKEN.7.Season.Pass.4.REPACK-CODEX.part05.rar? TEKKEN.7.Season.Pass.4.REPACK-CODEX.part05.rar
This is the name of a well-known (now retired) scene group that specialized in releasing cracked versions of PC games. This indicates the files have been compressed and
Multi-part archives allow users to download different segments simultaneously from different mirrors. 3. How These Files Work TEKKEN.7.Season.Pass.4.REPACK-CODEX.part05.rar