I used to play a game called Empires mod when it was newer, it's a source mod where there was a command vehicle in which a single person would be viewing the map and conflict from above like an RTS. They had the full abilities of any RTS, they would manage funds and place structures and whatnot, putting resource gatherers on the resource nodes, building barracks and weapons factories and so on. The person in the command vehicle could also mark targets for the rest of the team, so they could se