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.
XCOM: Enemy Unknown system requirements
Operating System: Windows Vista
Processor: 2 GHz Dual Core
Graphics Card: NVIDIA GeForce 8600 GT / ATI Radeon HD 2600 XT or greater