XCOM: Enemy Unknown + Within PC Download

XCOM: Enemy Unknown is an action and strategy video game with a sci-fi theme in which you must take command of a secret organization called XCOM.

As the commander of this paramilitary organization, you will have to defend Earth from an alien invasion by developing technologies, managing resources, and overseeing combat strategies and tactics of individual units.

You will control the fate of humanity by researching alien technologies, creating and managing a fully operational base, planning combat missions, and directing the movement of soldiers in battle.