Black Mesa update — build 4520258 from 12/23/2019

We pushed a big update to public beta.

If anyone is able to test the game, it would be a big favor to us. Assuming nothing is terribly wrong, we will release the Xen maps on mainline Steam.
We’ll have a full set of patch notes and more info when we release it on mainline. Thanks!


  • Fix a bunch of bugs;
  • Increase performance on A LOT of maps;
  • Fix crashes loading saves on Interloper elevator;
  • Refine the difficulty curve;
  • Increase player guidance.