From the makers of Sid Meier’s Civilization comes a game about civilization’s last stand. As the commander of an elite paramilitary organization known as XCOM, you control Earth’s defenses against a terrifying alien invasion. XCOM: Enemy Unknown The Complete Edition includes the Game of Year award-winning XCOM: Enemy Unknown, plus the critically-acclaimed expansion, XCOM: Enemy Within, and all of the released add-on content packaged together for an incredible value. Features: Complete Edition Contents Include: XCOM: Enemy Unknown XCOM: Enemy Within Elite Soldier Pack add-on content Slingshot add-on content Second Wave add-on content STRATEGIC BASE: Detect and intercept the alien threat as you build and expand your XCOM headquarters. Recruit, customize and develop unique operatives, manage your personnel, and negotiate with governments around the world. TACTICAL COMBAT: Direct your squad in fierce turn-based ground battles, engage in covert operations, and rescue civilians in crowded cities and desolate outlands around the globe. RESEARCH ALIEN TECHNOLOGY: Recruit scientists and engineers to unlock more advanced weapons, armor and abilities. MULTIPLAYER: Mix and match aliens and humans, and combine abilities to outsmart and overpower your opponent in intense, one-on-one, turn-based matches.