This is the most effective fix for 90% of players. If the file is missing or corrupted, Steam can automatically redownload it. Open your Steam Library. Right-click on Call of Duty: Black Ops 2. Select Properties. Go to the Installed Files tab. Click Verify integrity of game files.

Essential sound bank files (like .sabs ) may be missing or incorrectly named in your game directory. Solutions and Fixes 1. Verify and Complete the Installation

Follow these solutions in order. Start with Solution 1, as it resolves the issue 80% of the time.