Adding multiplayer networking

To make the scene run as multiplayer, we need at a minimum a Network Manager component and we need to identify any objects that will get spawned using the Network Identity component.

Network Manager and HUD

First, we'll add the Network Manager component, as follows:

1. Create an Empty game object and name it NetworkController
2. Select Add Component | Network | Network Manager
3. Select Add Component | Network | Network Manager HUD

We added a Network Controller HUD which displays a simplistic default menu, in screen space, that Unity offers to select the runtime networking options (you can see it in the images that follow). It's for development. In a real project, you'll probably replace...