It started for me when I went round to my mates house and he had just got WaW, we played through the campaign staying up all night finishing it. Then the nazi zombies intro loads up and me and my friend were like what the hell is this? We played it none stop after that and I've been hooked ever since! It was such a breathe of fresh air zombies mode. At the time of this I used to be obsessed with gears of war horde mode. I've got a thing for survival modes.To be honest I bought BO2,3 just for the zombies. Can't stand the multiplayer anymore since they added Exo suits and what not.