Now onto the Single player mode or the «single player upgrade» if you've purchased the multiplayer edition, this is basically the same as a private match in multiplayer, you play one of the multiplayer selections against AI on top of that you have survival mode which was rather confusing, my idea of the game was a normal FPS game with
zombies implemented so you can't camp, when you're playing the survival mode the full area has some sort of gas which will
kill you if you don't get out of it, you get sent to different air pockets which open up in a set area per round, this meaning you have to camp in the air bubble and take on the hordes of
zombies approaching, I've played a few
zombie fps games in my days and always wanted to move around, create a train and take them out, on top of that ammo drops or weapon drops are in said bubbles and lack in quality, I wasn't impressed with the survival mode implementation and wouldn't advise any horde fans to even look at it.