hey i need to return a game at wal-mart supercenter, has anyone done this before? can i still return it even though i opened it and played it? it is rome total war and my friend got it for me and his dad paid it with a credit card so would i need his card to return it? or can i even return it? or could i exchange it for another game or get store credit or what? plz help i want to get world of warcraft as soon as possible