Fg-optional-mp-zombie-04.bin

I can give you more specific troubleshooting steps for that game.

fg-optional-mp-zombie-04.bin is an used in FitGirl repacks, typically for Call of Duty games, that contains specific assets for multiplayer or zombie modes. fg-optional-mp-zombie-04.bin

It holds data required for "Zombie" or "MP" (Multiplayer) modes. I can give you more specific troubleshooting steps

You do not need to download this file if you only intend to play the single-player campaign. You do not need to download this file

It must be placed in the same folder as the setup.exe and other bin files before starting the installation. If you can tell me: Which Call of Duty game this is (e.g., Black Ops 2, MW3)? Are you trying to play local zombies or online multiplayer ?

If you try to launch zombies or multiplayer without this file, the game will likely close or throw an error indicating missing content.