Battlefield 3 is already a terrific game, but the Back To Karkand expansion adds more explosive content. Here is the new “Strike At Karkand” trailer, showing us our first extended look at gameplay footage.
https://kotaku.com/battlefield-3-the-kotaku-review-5854196
The first trailer displayed a general overview of the expansion, including the locales in which we would be fighting.
https://kotaku.com/our-first-look-at-battlefield-3s-intense-back-to-karkan-5856489
Back to Karkand features new weapons, vehicles, and classic maps from Battlefield 2. It will be released this December, free for those who bought a copy of the Limited Edition of Battlefield 3, or available on the same date at $14.99/1200 Microsoft Points.