[H] Battlefield 3 Back to Karkand Promocode [W] Portal 2

Promocode from Sapphire.

How to use promo code

Go to http://store.origin.com/ and add the PC downloadable version of Battlefield 3™ to your order.

Enter your code in the Promo Code field and click Apply.
A complimentary downloadable copy of Back to Karkand will be added to your order.

Complete your purchase.

You already have BF3? Then:

1.Sign in Origin

2.Add Battlefield 3 & Back to Karkand

3.Check out

4.Put the code in, the price of Back to Karkand should go to 0$

5.Remove BF3 from the cart.

And...buy it!