Gameplay in Brief:
In each of the game's three ages, players are dealt seven cards, from which they choose one and pass the rest to an opponent. The selected cards are revealed simultaneously and either "constructed" or exchanged for three gold. This continues until each player has six cards in play during an age. At the end of the third age, the player with the most victory points wins.
Cards can sometimes be constructed without a cost but most require resources (such as raw materials and manufactured goods) or gold. Structure types include civilian, scientific, commercial, and military.