Ea Are giving away free codes at the moment.
Just use any of the websites to obtain the code. you might need to sign up to the websites to get the code.
I singed up to Cvg to get mine. I know gamespot are all out. Be quick
Hope the games good
Edit- If You Dont Get any Today, Do not worry.
This is a week long promo by Ea, you can check each day for more codes on these sites.