They've prematurely released a broken, unfinished game. I've returned it to my retailer for a refund as it's totally defective.
Literally 80% of online games fail to render guns, walls, sometimes even played leaving you totally blind and requiring a complete reboot of the game.
I couldn't even play zombies as neither arcade nor machine would boot properly.
Didn't even bother trying to play the campaign after all this.
Sad really as the aesthetic is spot on, but forget buying this game it's a waste of money.
Anyone who wants Activision to change this awful business model should get a refund from their retailer.