I was using Radmin VPN to play Stardew Valley with my friends, until my friends started to get kicked. I searched Radmin VPN alternatives and found out about playit.gg. There was Hamachi too, but its so laggy.
So, my question is; is it possible to play Stardew Valley with playit.gg?
Yes playit.gg should work fine. Looking at some guides, I think this is what you need to do.
Create a Custom UDP Tunnel with port 24642 and port count 1. With playit and your game (with co-op) running on the same computer you can now have your friend join by connecting to your assigned tunnel address and port.
Let me know how it goes. I haven’t tried it myself but I don’t see why it wouldn’t work.