Battlefield 3 Back to Karkand Expansion Pack DLC Origin CD Key
Battlefield 3: Back to Karkand is the first DLC expansion pack for Battlefield 3. Back to Karkand expansion pack remasters four of the classic Battlefield 2 multiplayer maps. Leveraging Frostbite 2 game engine all maps now have enhanced levels of destruction for Strike at Karkand, Wake Island, Gulf of Oman and Sharqi Peninsula.
Go to: http://www.origin.com/us/about
Click "Download Origin" (from the upper left corner)
Login into downloaded application
Install and start application, login with your Account name and Password
(create one here: http://store.origin.com/ if you don't have).
Redeem Product Code
From the "Origin" drop-down menu (upper right corner) choose "Redeem Product Code...",
enter your code and click "Next".
Download your Game
After successful code verification go to the "MY GAMES" tab and start downloading.