Battlefield 3's Close Quarters DLC free during E3
On PC, you can grab Close Quarters by entering the code BF3E3 into the 'Redeem Code' option in the Origin client. On Xbox 360 and PS3, simply jump into the in-game store. It'll be free until June 18 or 19, depending on your region and platform, EA explains.
http://www.shacknews.com/article/79651/battlefield-3s-close-quarters-dlc-free-during-e3