XCOM: Enemy Unknown + The Bureau: XCOM Declassified

XCOM: Enemy Unknown
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 Bureau: XCOM Declassified 
The year is 1962 and the Cold War has the nation gripped by fear.  A top-secret government unit called The Bureau begins investigating a series of mysterious attacks by an enemy more powerful than communism.  As agent Carter, call the shots, pull the trigger and lead your squad in a gripping third-person tactical shooter set within a covert war to protect humanity from an otherworldly enemy.