Black Mesa Military base [ZM] Black Mesa Military base [ZM] for Garry's Mod on the Steam Workshop. Subscribers17,315 Favorites3,280 Views82,764 Workshop ID2946902048 Open on Steam
![Black Mesa Military base [ZM]](https://images.steamusercontent.com/ugc/2030599062748538864/15A0E2F15362FDC1E6845819C04C9A80FDD4DE9C/)