From the publisher's website:
In the year 2097, the entire earth was enveloped in a cataclysmic climate shift, plunging the globe into another ice age. Over 90% of the world’s population was eliminated, driving the survivors to band together into loose communities and tribes. You are the leader of a small tribe of survivors. Resources, tools, medicine, and mercenaries are all in scarce supply. You and your tribe are pitted against other tribes in a fight for survival. Build up your tribe, skirmish against other players head-to-head, or even bluff your way to victory. The leader who gathers the largest tribe will be victorious!