Files named in this specific format (Build ID + split rar parts) are typically found on or pirate repositories rather than official storefronts like Steam or GOG.
: Files from unofficial sources often carry risks of malware or unwanted bundled software. It is highly recommended to scan the archive with updated antivirus software before opening. UnderRail.Build.9884708.part2.rar
: Extraction will fail if any numbered part is missing. Files named in this specific format (Build ID