how/where do i sign up to use shift codes?

#1714kaosPosted 7/6/2013 4:39:51 PM
Says i have acess restricted even though im on xbox live...says i need onlone privileges?thanks in advance for any help;)
#2714kaos(Topic Creator)Posted 7/6/2013 5:12:40 PM
Bump
#3scorpio manPosted 7/6/2013 5:13:52 PM
Go into the extras menu in the title screen
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