This bundle pack includes XCOM: Enemy Unknown and XCOM: Enemy Within.
XCOM: Enemy Unknown is a reimagining of X-COM, the classic strategy game from 1993, and developed by the award-winning creators of Civilization. Threatened by an unknown enemy, the Earth's governments unite to form an elite paramilitary organization, known as XCOM, to combat this extraterrestrial attack. As the commander of XCOM, you control the global defense team in a battle against a terrifying alien invasion by creating a fully operational base, researching alien technologies, planning combat missions, and controlling soldier movement in battle.
XCOM: Enemy Within is the expansion to XCOM: Enemy Unknown. Enemy Within adds an incredible array of new abilities, upgrades, and weapons to combat new enemy and alien threats. The expansion pack also introduces new maps, new tactical and strategic gameplay, and new multiplayer content to provide a fresh new gameplay experience.