You’ll need to sign in to the second controller using a separate PSN or Xbox Live account, then just jump into a lobby. Just connect your second controller on Zombies or Multiplayer by pressing X on Playstation or A on Xbox in the lobby before searching for or starting a match. It doesn’t seem likely though - Modern Warfare never got split screen on PC, and with the Battlenet launcher the COD series uses, players are barred from using multiple different user IDs at the same time. I’ll let you know if that changes though - I certainly hope it does. I hate to be the bearer of bad news, but at time of writing, no matter how many controllers you connect, the option is not present. On PC, you can’t use split screen in Call of Duty: Black Ops Cold War. Can you play split screen in Call of Duty Cold War on PC?
