Each player starts off with a few villagers and a Harald Haardraade.
The villagers construct buildings for different benefits. For example, build a mining camp and you will get an Elite Longbowman. Build a barracks, you will get two cavaliers. Build a market, you will get a saboteur. Build a Town Center, you will get a new villager and +stats for your Harald Haardraade.
The idea is random, the gameplay is crazy. Have fun!