Use this tool to ensure your game files are complete and not in a corrupted state.

Usage: Place T6VerifyTool.exe in your BO2 base game folder (Where t6rmp.exe is located)
Then run the T6VerifyTool.exe file to start the checking process.

Download:
https://drive.google.com/file/d/1_2LVnma_LG1-bcIjdqOv6bX9jzMJv7rv/view?usp=sharing