Clear the Cache of Your Console. Another common reason for the Call of Duty Modern Warfare Multiplayer not working error is the corrupted cache data. In this case, you can try clearing the cache files on your PC or console to fix the issue.

Two-Player Local Multiplayer\n\n Call of Duty Modern Warfare 2 (2024) does not support the traditional four-player local multiplayer, but players can still enjoy two-player split-screen co-op by setting up a private match in the multiplayer mode of the game.