Anyone find a solution to the serial registration? I am having the same problem. I purchased 4 games in-box and am prepping a LAN multiplayer match. I understand multiplayer is online requiring an update but the update will not proceed without registering the serials. I am happy to do so but I get an error message saying it is not a valid serial. So... I attempted to contact Impulse, they were purchased by Gamestop. I contacted Gamestop and they directed me to St
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