Indeed
Ehhhh most will require a receipt or gift receipt or if you have neither and it was bought at gamestop under a power up rewards account they can find it for you. But legally you should have a receipt for any return. And it does have to still be sealed.
Should be able to switch it straight up if it is not opened, depending on price difference. This specific store may try to give you a hard time if you don't have a gift receipt for the game. But, you shouldn't have any problems if it is not opened.
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