Or just get the pc ones for free by signing up on the official callofduty website, then going on your account profile. Xbox ones for free : Go on gamestop and find the CoD5:WaW pre-order, and proceed to the beta section make a random 5 digit number up for your transaction ID, then add /01-044 at the end of it and fill in the rest of the form. Voila, there are your codes, for free