User blog comment:Callofduty4/Black Ops 2 campaign demo, much info released/@comment-4300017-20120524010405/@comment-5086876-20120525123256

what zombies should have is levels and ranking up like spec ops but way more levels. and at certain levels you unlock attachments like a red dot that you could buy to always be on a certain gun. and some levels a new weapon class to customize. ex. LMG customization lvl 42. and you should also be able to upgrade the weapons damage, recoil etc. the attachments are a permanent thing like if you buy a red dot sight for the type 95 you will always have the red dot on the type when you get it from the box or wall. you would get money and xp by killing zombies and getting bonuses after a zombie game as in black ops multiplayer. that's my thoughts about zombies.