Hello there! I was a bit sad to see that there's no multiplayer activity for Black Mesa so I just put online a 24/7 server that host a coop custom arena map! Fight through 5 waves of monsters to win the day :D This is also part of a multi-server concept I've been running for a few years (x.com/FindGmanMusk), so if you succeed, your win will be automatically tweeted! We also have leaderboards and stuff on Discord. IP of the server is on the top tweet (x.com/FindGmanMusk/status/183085…). Enjoy! :-)