Compare prices and buy XCOM: Enemy Within Key

Requires the base game XCOM: Enemy Unknown to play. XCOM: Enemy Within adds an incredible variety of new abilities, upgrades and weapons to fight new enemies and alien threats. This expansion also introduces new maps and missions, new strategic and tactical gameplay, new multiplayer content and providing a new gaming experience fresh and interesting. New skills for soldiers, expanding the arsenal available, tactical challenges and new maps, ... and endless of content that will greatly expand the gaming experience.