I’ve been working on this for a while now. both the server and client use conventions very similar to unity.
The library is currently used by an mmo, and with the single stress test we’ve done, it held up pretty well (we reached several hundred players during peak, often all in the same room).
Both client and server libraries are compatible on windows/mac/linux.
As the server is custom software, and not based on unity, it lacks the ability to perform physics calculations. However, as it’s just a library, it is possible to add physics by using a third party c# physics library, such as jitterphysics
there is an example client and server setup to get a basic understanding of how the libraries work.