Black Mesa Train-Yard [GM] Black Mesa Train-Yard [GM] for Garry's Mod on the Steam Workshop. Subscribers12,748 Favorites2,352 Views53,450 Workshop ID1958007290 Open on Steam
![Black Mesa Train-Yard [GM]](https://images.steamusercontent.com/ugc/776241410542312256/C6B860FCC496B7CCFFCEE926D923A0A7E54F9FEB/)