Ensure part1.rar , part2.rar , and any subsequent parts are downloaded to the same directory.
If you tell me which version of you are trying to play (e.g., the original 2007 version or the 2019 reboot), I can provide: Specific system requirements to ensure it runs. Guides for fixing common installation errors . download-call-duty-moden-warfare-apun-kagames-biz-part2-rar
Information on current or free-to-play options like Warzone. Ensure part1