1) Watch this video: . During the last few minutes Erik talks about the simulation server and the master simulation server. We need the master simulation server to be exact, because it allows us to split the game world between different server instances automatically. I am sure it is worth waiting for it, since this would make hosting uMMORPG very easy (via the build menu). 2) That would be the server library that was mentioned above. It's a library to use UNET functions from outside of Unity.