Settlements have 3 stages of their development: village -> town -> city (metropolis). Every new level offers new building sites, allowing new types of buildings and increasing the number of serfs at your disposal.
Free building sites can be used to construct machinery, craf artifacts and magic scrolls and raise buildings.
Every city, depending on its level, has its own number of serfs. Serfs are householding units, that can me moved and controlled, swapped from one job to another. The number of workers is fixed. They cannot be killed. The radius within which they can work is limited by the level of their settlement.
Workers: 3 / Worker’s operational radius: 3 cells. / Construction sites: 6 / Storage: 13 slots. / Karma: 10
Workers: 5 / Worker’s operational radius: 5 cells. / Construction sites: 12 / Storage: 26 slots. / Karma: +10 = 20
- City (Metropolis)
Workers: 6 / Worker’s operational radius: 6 cells. / Construction sites: 18 / Storage: 39 slots. / Karma: +10 = 30