In your Steam Library, click the dropdown menu above the search bar and ensure is checked. Search for Source SDK Base 2006 and install it. Set Launch Options:
To download and play Garry's Mod 9 (GMod 9) , you can use the original free installer from legitimate community sources, but you will still need the installed to provide the necessary game engine files (Source SDK) . GMod 9 was the last free version before the game became a paid product. Prerequisites skachat garris mod 9 no steam
Obtain the installer (version 9.0.4) from a reputable mirror like ModDB or GMod9.com . In your Steam Library, click the dropdown menu
Restart Steam, then launch Source SDK Base 2006 from your library. This will open GMod 9. In your Steam Library