How do you delete the campaign files for black ops 2?

To delete the campaign files for Call of Duty: Black Ops II, navigate to the game's installation directory on your computer. Look for the folder labeled "players2" or similar, where the save files are stored. You can manually delete the relevant files within that folder. Alternatively, you can also use the game's settings or the platform's interface (like Steam) to manage game files and delete saved data.