Zombies mode has been in call of duty since world at war which was released all the way back in 2008 which has become a fan favourite ever since then it’s one of the main reasons people play call of duty is to just play zombies.

it would be a awesome idea if Activision would make a call of duty zombies a standalone game which could be a live service game where players could play old versions of zombies and update the game with newer maps