XCOM Enemy Unknown Slingshot Pack DLC Key

XCOM: Enemy Unknown will put you in control of a secret paramilitary organization called XCOM.
As an XCOM commander, you will defend yourself against a terrifying global alien invasion by managing resources, developing technologies, and overseeing individual units' combat strategies and tactics.
The game will expand this legacy with a completely new story of invasion, enemies and technology to fight the aliens and defend the Earth.
You will control the fate of the human race by researching alien technologies, creating and managing a fully operational base, planning combat missions, and controlling the movement of soldiers in combat.