If you are genuinely trying to solve a technical problem with a legitimate split archive file, I can write a detailed guide on how to handle multi-part RAR archives.
This indicates that the total game file—which is several gigabytes—has been split into smaller chunks. To use the game, you need all the parts (part1, part2, etc.) to extract the full XCI. Why Is the File Split Into Parts? POKLEGARC-NSwTcH--BASE--XCI-Ziperto.part2.rar