Part 1 of a multi-part archive is useless without the subsequent parts ( part2.rar , part3.rar , etc.).
Downloading files with this naming convention—specifically part1.rar along with .fix or crack indicators—carries a very high risk of downloading malware, ransomware, or viruses. These files often come from untrusted sources, not official game publishers. Potential Risks File: Beasthunter0.1.2.5fix.zip.part1.rar ...
Many such "fixes" are Trojan horses designed to compromise your computer. Part 1 of a multi-part archive is useless
These are typically illegal distributions (piracy). Recommendation I can provide more specific information.
If you can confirm which platform or site you found this on, or if this is a game you are developing, I can provide more specific information.