The Ultimate XCOM Experience

XCOM: Enemy Within is the standalone expansion to the 2012 Strategy Game of the Year and includes the base game experience with all new expanded content as well as the Elite Soldier Pack, Slingshot and Second Wave add-on content.

• New Soldiers, Weapons, and Abilities: Research new alien technology to develop new weapons as well as genetic and cybernetic enhancements for your operatives.
• New Enemies: Develop new tactics to counter the threats from two new alien types and a deadly new organization known as EXALT.
• New Maps and Missions: Cloak-and-dagger and intelligence operations provide new tactical challenges on new battlefields.

XCOM: Enemy Within (Commander Edition) for Xbox 360, developed by Firaxis Games
Released in 2013
Rated M for Mature 17+ (Blood and Gore, Strong Language, Violence)