Most "missing DLL" errors in games like Resident Evil 6 are caused by where antivirus software flags the steam_api.dll as a threat and moves it to quarantine.

If verifying the files does not work, the installation may be deeply corrupted.

Before downloading anything, check if your security software has "hijacked" the file. Check Quarantine : Open your antivirus (e.g., Windows Defender) and look at Protection History Quarantined Items Restore and Exclude : If you find steam_api.dll , restore it and add the Resident Evil 6 installation folder to your exclusions list so it isn't deleted again. 2. Verify Integrity of Game Files (Steam Version)

: Open your Steam Library, right-click Resident Evil 6 , and select Properties . Go to Installed Files (or Local Files ) and click Verify integrity of game files... . Steam will automatically detect and re-download the missing steam_api.dll .