Press enter. The screen should instantly split horizontally. Player 2 now controls the newly spawned character.
Still in the console, type: scr_splitscreen 1 Black Ops 1 Zombies Split Screen Pc
There’s a certain magic to Black Ops 1 Zombies. The claustrophobic halls of Kino der Toten. The terrifying roar of a Hellhound. The frantic cry of “Revive me, I have the Ray Gun!” Press enter
Press the tilde key ( ~ ) while in the game lobby or paused in-game. A grey text box will slide down. Still in the console, type: scr_splitscreen 1 There’s
Boot up the game using your keyboard. Go to Solo Play > Zombies > Select your map (Kino, Five, etc.). Start the game as Player 1.
But the feeling of handing a friend a controller, hearing that creepy piano intro to "Kino der Toten," and holding a hallway together on a single PC monitor? That is pure nostalgia. For the price of ten minutes of setup, you can resurrect the golden era of couch co-op.
But on PC, that couch co-op magic has felt locked away for years. Activision never officially supported split-screen for Black Ops 1 on PC the way Treyarch did for consoles.