New maps, new tactics and new enemies await in XCOM: Enemy Within.
This expansion pack for Enemy Unknown adds a host of new features to take your missions further. New mods and abilities will enhance your soldiers, new weapons and MECs will enhance your arsenal, and new maps and challenges will enhance the campaign mode all of which you'll need to master to take on the new alien threats. Plus, multiplayer gets new maps, units and abilities to keep you playing online for longer.
XCOM Enemy Within for PC is an expansion pack that requires a copy of Enemy Unknown to play, while the XCOM: Enemy Within Commander Edition for Xbox 360 and PlayStation 3 included the original game, giving you everything you need to join the fight!