do the perks save, or do you start over everytime you play?
as much as I know, in regular zombies ,everytime you start a new game (from round 1) you will have to buy the perks all over again. To add to that, everytime a zombie hits you and you get DOWNED, then again you will have to buy perks,
In transit mode there are slight tweaks to it, and I dont really want to get into that since I do not have the game yet. I STRONGLY suggest you try to youtube some videos