玩家将他们的工作人员围绕着沿河两岸建造房屋的董事会(由可变组的六角形组成)组成。每一个河流上的某些六角形都可以用钱(你用来建造房子)或木材(用于制造水坝)来支付。第一名建造全部五座建筑物(四栋房屋和一座庄园)或一座庄园,三座房屋全部在河岸上的玩家获胜。玩家们建造大坝来改变河流的流动。
Players move their workers around the board (which is composed of variable groups of hexes) building houses along the banks of two rivers. Each turn certain hexes along the river pay out, either in money (which you use to build houses) or lumber (used to make dams). The first player to construct all five of their buildings (four houses and one hacienda) or a hacienda and three houses that are all on a riverbank, wins. Players build dams to change the flow of the rivers.