i had same issue you have to install each one separately also they can only be accessed through the multiplayer part of the game they are multiplayer only no solo play. the way i got to the dlc was to go to the store go onto s.w.b.f click on it and im sure somewhere it says there are 13 downloadable content the map packs are in there and you can download them...im not to good at explaining things hope this helps in some way
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