Open GeForce Experience, download the latest driver, and select "Custom Installation" > "Perform a clean installation."

Look for a file named Sam3.ini or User.cfg (if not there, look in userdata under your Steam installation folder). Open the file with Notepad.

If you are trying to launch Serious Sam 3: BFE only to be greeted by a black screen or a crash with the error you are not alone. This is a common issue with the Serious Engine 3.5 when it fails to handshake with your monitor's resolution or refresh rate.

Right-click your Windows desktop and select . Scroll down and click on Advanced display . Locate the Refresh rate drop-down menu. Temporarily lower it to 60 Hz .