If it's for this game, you likely need a tool like Thunderstore to manage the plugins. Place the Files:
Right-click the game in your library, go to Properties > Installed Files > Browse . hg mod.zip
"HG" often refers to HG Hairdos or the HG EyeCandy Body (HGEC). These mods typically require a mod manager like Mod Organizer 2 (MO2) for proper installation. General Content/Installation Steps If it's for this game, you likely need
Look for a .txt file inside the folder for specific instructions from the creator. Identify the Game Directory: If it's for this game