This is an expansion for Civilization. Included are more civilization advancements (both quantity and type), which give the players new options for advancement, as well as a slightly restructured commodity trading round, which has new resources and disasters to be traded. The most significant aspect of the game is a restructuring of the advancement/victory conditions, which removes the limits on advancement cards. Some claim this makes the strategies more homogenous, while others claim the reverse is true. - BoardGameGeek