Thanks.There is no key anywhere inside the box.Any other ideas?
If you are sure we are talking about the same edition of the game, there are two options.
1. The sticker fell off some time after you purchased it, perhaps for safe keeping.
2. Someone bought the game from Wallmart first, then registered the CD key then returned it. While PC games are now excluded from return policies after being opened now, perhaps that wasn't the case several years ago.