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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.
Use the AMD Cleanup Utility or DDU (Display Driver Uninstaller) to wipe old drivers before installing the newest Adrenalin software. 🛡️ Fix 5: Run as Administrator and Compatibility Mode serious sam 3 cannot set display mode
Search for the following lines and change their values to match your monitor: gad_iPosX = 0; gad_iPosY = 0; gad_iWidth = 1920; (Change to your monitor width) gad_iHeight = 1080; (Change to your monitor height) Save the file and restart the game. 📺 Fix 3: Lower Your Monitor Refresh Rate If you are trying to launch Serious Sam
Navigate to your Serious Sam 3 directory (Usually C:\Program Files (x86)\Steam\steamapps\common\Serious Sam 3\Content\SeriousSam3\Config ). 🛡️ Fix 5: Run as Administrator and Compatibility
Find the game's .exe file (usually inside the Bin or Bin\x64 folder). Right-click the executable and select . Go to the Compatibility tab. Check Run this program as an administrator . Check Disable fullscreen optimizations . Click Apply and OK.