You get new abilities, weapons, upgrades and a new type of soldier class to combat your alien and human foes (EXALT) in this meaty addition. In other words: its one hell of an expansion pack. It seamlessly integrates into the main XCOM narrative and provides brand new options out of the gate for your gameplay edification. It's not just a cheap attempt to cash-in to the franchise either, the Enemy Within campaign is a chunky additional campaign add-on that puts in loads of new stuff. I'd go so far as to say that the game is worth it even if you have the previous Enemy Unknown since you get the core game and all of this good stuff out of the gate, no muss, no fuss. It's got tons of replay value, core value and comes packed with the Elite Soldier and Slingshot add-ons for a reasonable price. XCOM: Enemy Within in many ways is the game that I wanted XCOM: Enemy Unknown to be.
