Minecraft wiki entry for Building_a_metropolis, associated text: Industry: Build a city entirely around producing things from raw materials. For this theme, you may want to limit the population to mainly workers. You could have the performance of the workers tracked either through a mod or a server rule. The buildings may be made of grimy metal (and possibly stone) and there could be a limited number of buildings that are not for work. Try and create a grimy, dirty, polluted feeling around the city as a whole. Large logistics networks could be set up, like minecart trains carrying ore from mines to the smelters, carrying food from farms to processing plants, etc. You can put security features in place to prevent industrial espionage or stealing of the goods produced in your city. This kind of city might be quite competitive, trying to outsell or accumulate more wealth than other places.