I’ve seen numerous recipes to try and install Black Mesa (I had to search too since it wasn’t working). Here’s what did the job for me, where other recipes didn’t.
Launch Steam and install, in Library/Tools, “Source SDK Base 2007”. This takes a little less than 4 GB on the disk.
Download the BlackMesa.7z file.
You can download the installer as well and try to run it but here it failed, probably because Steam has changed (I’m not sure this project is still on), and also because it wasn’t uncompressing the .7z archive. So in this case you can simply follow the next steps.
- Uncompress it into \SteamApps\sourcemods\BMS, so it looks like this:
- Create a shortcut.
For example, if your Steam directory is D:\games\Steam, the shortcut target should be:
D:\games\Steam\Steam.exe -applaunch 218 -game “d:\games\Steam\SteamApps\sourcemods\BMS\BlackMesa”
You don’t need to see it in the Steam library, I doubt that these days it’s still possible to make it appear there anyway.
- Launch the game from the shortcut.
HTH. Have fun!