2K has announced that XCOM: Enemy Within, an expansion to XCOM: Enemy Unknown, is now available in North America for Windows PC, Xbox 360, PS3 and Mac (the latter being distributed by Feral Interactive). In XCOM: Enemy Within, players can modify their soldiers genetically to enhance their operatives' abilities or transform their soldiers into cybernetic warriors. These new abilities and units are imperative to combat two new aliens, the Mechtoid and the Seeker. In addition to new aliens, XCOM: Enemy Within adds a new threat known as EXALT, an underground human organization set on disrupting XCOM operations and taking control of Earth. XCOM: Enemy Within also includes an array of new maps, abilities, upgrades and weapons across both single player and multiplayer.
XCOM: Enemy Within will launch internationally on November 15, 2013.