Second Wave is the first expansion for Excavation Earth, introducing two new races - the Collectors and the Influencers - along with new game-play elements and ways of scoring. The Observation Barge, which lets you further manipulate the market demand for artifacts and score points at the end of the game. Achievements add a whole new way of scoring by completing set goals and Racial Wildcards give each race their own, more powerful action card to boost their round! —description from the publisher