The specific filename you mentioned, gangbeasts-fix-repair-steam-v3-generic.rar , is commonly associated with unofficial patches or "cracks" used to bypass Steam's DRM or to enable online multiplayer on pirated versions of the game.
These files are often used to distribute malware, ransomware, or miners. gangbeasts-fix-repair-steam-v3-generic-rar
This is the standard "repair" method for any Steam game. It checks for missing or corrupted files and replaces them. Open your . Right-click on Gang Beasts . Select Properties > Installed Files . The specific filename you mentioned