In Concordia, players control a Roman dynasty aiming to solidify their foothold in the map's given territories. Through the use of cards, players will complete certain actions: moving their colonists and constructing houses; producing goods or collecting Sesterii (money); placing new colonists or collecting Sesterii; selling goods for Sesterii; and so on. All of these actions are done through the use of starting cards that each player receives. As the game progresses, though, players will begin to purchase other cards for their deck.