Quote: Originally Posted by wildcpac Couple of questions. Can you stack the codes together. Like if I get 10 from MW 2 and 5 from GTA. Can I apply 15 towards Left 4 Dead 2? Can I apply the code to games that I already have pre ordered?

Yes they can stack. You can also use a ECA code along with these if you're a member.

You can't apply to games you've already ordered yourself. You can email customer service and see if they can do it for you. Not sure what they'll tell you.