Speaking of issues, here are some of the most common Garry’s Mod problems on Windows 10: Garry’s Mod is a great game, but many users reported various issues. How do I fix Garry’s Mod problems in Windows 10? Garry’s Mod is a great game, however, the game has certain issues, and today we’re going check out some of the most common Garry’s Mod issues on Windows PC. Garry’s Mod managed to utilize Source’s physics model in order to create one of the best sandbox games of all time.