Call of Duty: Black Ops 1 does not natively support split-screen on PC. To enable this feature for Zombies mode, you must use third-party tools like Nucleus Co-op, which creates multiple game instances and maps them to separate controllers. Requirements

Performance & stability

Manual DLC Activation for Split-Screen Mod:

seta cl_maxPing "100"
seta scr_game_allow_join_during_match "1"
seta party_enable "1"
seta party_minplayers "1"
seta party_maxplayers "2"
seta scr_game_allow_join_during_match "1"

• Access Zombies: Navigate to the multiplayer section and select zombies.
• Map Selection: Choose your preferred map.
• Character Selection: Pick your characters (if the game allows it).

: Since you are running the game multiple times, ensure your PC has at least 12GB of RAM and a decent GPU to maintain a stable frame rate. Keyboard & Mouse