In Terraforming Mars The players acquire unique project cards (from over two hundred different ones) by buying them into their hands. The projects (cards) can represent anything from introducing plant life or animals, hurling asteroids at the surface, building cities, mining the moons of Jupiter, and establishing greenhouse gas industries to heat up the atmosphere. The cards can give you immediate bonuses, as well as increase your production of different resources. Many cards also have requirements and they become playable when the temperature, oxygen, or ocean coverage increases enough. Buying cards is costly, so there is a balance between buying cards (3 mega credits per card) and actually playing them (which can cost anything between 0 to 41 mega credits, depending on the project). Standard Projects are always available to complement your cards. 1-5 Players, Age: 12+