Enhance your tactical command and fight a new alien threat in XCOM: Enemy Within for the Xbox 360. This massive expansion to the award-winning strategy game XCOM: Enemy Unknown introduces a wealth of new content. Battle a mysterious new human faction known as EXALT and discover a powerful new alien resource called Meld. Use this resource to genetically modify your soldiers with powerful new abilities or transform them into cybernetic MEC Troopers. With new maps, enemies, missions, and multiplayer capabilities, the definitive tactical experience just got deeper. The war for humanity's survival has evolved.