Start up your Halo 4
Highlight and click "Xbox Live Market"
It will give you an overview and say the transaction is 0 cost
Confirm Purchase
http://www.gamefaqs.com/boards/632877-halo-4/64879917
Highlight and click "Xbox Live Market"
It will give you an overview and say the transaction is 0 cost
Confirm Purchase
http://www.gamefaqs.com/boards/632877-halo-4/64879917