XCOM: Enemy Unknown Complete Edition Includes: XCOM: Enemy Unknown XCOM: Enemy Within Elite Soldier Pack add-on content Slingshot add-on content XCOM: Enemy Unknown will place you in control of a secret paramilitary organization called XCOM. As the XCOM commander, you will defend against a terrifying global alien invasion by managing resources, advancing technologies, and overseeing combat strategies and individual unit tactics. The original XCOM is widely regarded as one of the best games ever made and has now been re-imagined by the strategy experts at Firaxis Games. XCOM