How to play Call of Duty: Black Ops Cold War zombie split-screen. Zombies is a game mode that relies on teamwork. While you can play the mode both locally and online, fans were aghast to learn that on release you could not play local split-screen due to a bug. Players can join forces in high-octane multiplayer action or slay endless waves of the undead in an all-new zombies mode. It is currently unclear as to whether a split-screen campaign experience will be arriving to the game in the future. How To Enable. You will have the option to play split-screen either vertically or horizontally. Download the latest Nucleus Coop Program [github.com] to play split-screen. Password is "nucleus" . (OPTIONAL: Use the 7zip [www.7-zip.org] program to extract, if needed.) 3.) Extract and place the Nucleus Coop files you downloaded in a new folder. (Name that folder anything. I named mine "Nucleus Coop".) Requirements - Call of Duty: Black Ops 2 game files (I have tested steam, plutonium and Fitgirl). The game will need to be set to English or you will have connection problems. Moreover, the display mode will need to be set to windowed mode in order for split screen to work. eMQPZ.