Concept of antique city with tanker under it. Why tanker lies under the city, how people of the past took oil from it and ho many there are tankers under this living place - it's question of further game-developmnet.
fields of brick -concept of game location with old lines of carts, it's all is a fields of platforms for drying homestead bricks
iron giants - concept of an industrial settlement, whose population is adapting to the end of modern technology