Most of the time when i play black ops 2's multiplayer i play it offline, mainly Anyways i bought the extra slots pack and was wondering why i can't use it offline. "The Extra Slots Pack increases the number of customizable Create-A-Class sets to 10 and expands media storage, allowing players to archive 20 more. I REPEAT NOT SWITCH SETS MID GAME!!! If you haven't prestige and you get the DLC you will have 10 sets.
Black ops 2 extra slots pack Video