Take your semi-truck to the indicated spot and park it there. Watch out for the heavy trafficked road full of mad drivers whom won't let you cross the street easily.
Grow your own tribe from first human-primates era to a first recognized ancient civilization. Develop your primitive encampment to a flourishing place. You need to grow population, manage workers, research technologies.
Fight an infection present in human body. The first battle takes place in the nose. All towers produce units slowly over time. To get more units, you need to claim more towers and make them your own. Take over all enemy bases to complete each level.
