XCOM: Enemy Within New Soldier Abilities: Research a new alien technology to advance the capabilities of your operatives: Gene Mods: Construct the Genetics Lab to physically enhance your operatives abilities including augmentations to the chest, brain, eyes, skin, and legs New Weapons and Equipment: Give your operatives an extra tactical edge with new projects from your engineering team and the Foundry New Enemy Threats: Adopt new tactics to counter the threats from two new alien types and a deadly new organization known as EXALT New Strategic Resource: A valuable new alien resource, known as Meld, has been discovered. Secure it on the battlefield and use it carefully back at base to unlock new research and upgrades New Tactical Challenges and Maps: Cloak-and-dagger and intelligence operations provide new tactical challenges on over 40 new battlefields New Multiplayer maps, units, and abilities: Create your custom squad from a wider array of options and dominate your opponent in intense, one-on-one, turn-based matches