Black Mesa will not start


Need help! Whenever I try to start Black Mesa from Steam, it seems to boot up, then it closes; no loading screen or error message. Using task manager shows the .exe launching while using 20,000 K memory, before dropping down to 18,000 K or so, then closing. I’ve verified my game several times and have switched developmental branches several times with no success. Any form of help would be greatly appreciated!



If you are running windows 10 try this.

  1. Go to Black Mesa’s “Properties” and then “Set launch options.”
  2. Enter “-window -noborder”.


Forgot to delete this, but I fixed the issue. Turns out I didn’t finish installing the non-beta patch. Let it complete, then it worked again. Thanks for the help though!