The multiplayer test is now up on the betas branch for Sir, You Are Being Hunted. Details of how to get at that and how to run your own servers are over here.
We've got a few of our own servers up, but they might be a little slow, so if you can run your own and let us know how you get on, that'd be appreciated.
We did a video to explain a bit about what we're up to, over here: https://youtu.be/zDxvUqyktoo
Please do let us know how you get on. We'll be updating again early next week.
Cheers!
-BR