If updating doesn't work, you might consider reinstalling Steam. This will require you to reinstall all your games.
This error usually appears for three reasons: steamapidll resident evil 6 download fix
If you are encountering a missing steam_api.dll error while trying to play Resident Evil 6 If updating doesn't work, you might consider reinstalling
If your Windows registry is damaged, DLL calls fail. Run an SFC scan: If updating doesn't work
If you own the game on Steam, this is the safest and most effective method. It compares your local files to official servers and automatically redownloads any missing or broken ones. Open Steam and navigate to your Right-click on Resident Evil 6 and select Properties Installed Files (or Local Files) tab. Verify integrity of game files