The name in your file——is a "watermark" intended to show the file’s origin and protect users from fake "impersonator" sites that often bundle malware with their downloads. The "Part 1" Mystery
The "story" of this specific file is one of : Gloomhaven -- fitgirl-repacks.site --.part1.rar
If Part 1 finishes but Part 7 gets corrupted, the whole game is unplayable. The "Part 1" file is the first step in a long journey of digital extraction. The Conclusion The name in your file——is a "watermark" intended