Enemy Within was announced at Gamescom yesterday. It takes place in Enemy Unknown, so it's the same game with more content.
The expansion adds new weapons and equipment, new enemies, more resources, additional "tactical challenges" on maps and much more content for multiplayer.
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.
MECs: Build the Cybernetics Lab to enable the construction of the new Mechanized Exoskeletal Cybersuit, or MEC. The new MEC Trooper class has specialized abilities and each suit can be upgraded with new weapons including the flamethrower and grenade launcher.
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 classes including the Mechtoid. New Strategic Resource: A valuable new alien resource, known as MELD, has been released onto the landscape providing access to new research and upgrades.
NEW TACTICAL CHALLENGES AND MAPS
New tactical challenges are introduced across an additional 47 maps.
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.
Enemy Within will be available on PC and Mac for $30, while Xbox 360 and PS3 get the $40 "Commander Edition" that includes a copy of Enemy Unknown and the Slingshot and Elite Soldier content packs. XCOM: Enemy Unknown ‘Enemy Within’ is out from November 12th. As always, let us know your thoughts in the comments, below!