While also performing all below roles, this guy administrates the server and manages it all.
The server has to come from somewhere.
Planning something of this scale is no small feat. These people determine what needs to be done, and try their best to do it. If they can’t, they pass it on to another on the team who can.
What’s a world without buildings and fancy structures?
Ahh, the functionality. The part that requires a lot of attention to detail.
An artist makes textures. Those textures you see all the time.
Who doesn’t want custom sound effects and music?