How do I get multiplayer working?

I can't seem to get it stable at all. For example, when one client is connected using the controls attempts to control all the characters on screen, and shooting will shoot the weapon for every character. And only the host can be seen, the host can't see the peers and the peers cant see eachother.

You have not given us much to go on here thedude1693.

Have you tried the multiplayer example games ?