If the error mentions a specific missing asset like fonts/720/consolefont alongside the sound error, it almost always confirms a missing language pack. Make sure your "zone" folder also has an "english" subfolder with the correct .ff files.
Open it with Notepad and ensure the first word is . If it says something else (like polish or russian ) while you lack those sound files, the game will crash. black ops 2 sound bank failed to load cmnrootenglish best
Open it with Notepad and ensure the first word is english (all lowercase). If the error mentions a specific missing asset
But for many PC players, that is exactly what happens. You hit "Play," the screen flashes... and then you are greeted by a gray box with the dreaded text: black ops 2 sound bank failed to load cmnrootenglish best