Really, a quite fun card game revolving around maintining the environmental stability of the earth over a few centuries. its not all about "going green" or anything like that, rather its more about balance and development. Its quite hard so be prepared to lose all the time. despite that I keep comming back for more. I wouldnt say it makes you "think" *Rolls eyes* but it is quite entertaining none the less. If you like turn based card games and management games this is a great buy.