Natural Selection 2 pits alien against human in an action-packed struggle for survival. Wield devastating weaponry as a Frontiesman marine, or become the xenomorph as a deadly. Kharaa life-form. While both teams fight each other in first person, two commanders look down on the battlefield in a top-down Real Time Strategy view. These Commanders can issue orders, build structures, collect resources, research technology, and deploy abilities to help their team overcome the enemy.