In Tail of the Sun, you are a caveman in a vast prehistoric world with one driving goal: build an ivory tower from mammoth tusks tall enough to reach the tail of the sun. The path there runs through everything the untamed world has to offer — deserts, caves, forests, ocean floors, and countless creatures trying to stop you. Hunt, run, swim, and climb to develop your tribe's attributes, gather enough food for the community to grow and thrive, and piece together a monument to raw ambition one tusk at a time.