Look for gfx_bLastGoodFullScreen and change it to . Save the file and start the game. Method 3: Clear and Verify Corrupted Game Files
Complete the setup wizard, restart your PC, and launch the game. 2. Manually Edit the SeriousSam3.ini Config File
Corrupted GameSettings.ini is a common cause. serious sam 3 cannot set display mode top
This is the quickest fix. By forcing the game into windowed mode, you bypass the fullscreen handshake that usually triggers the error. Open your . Right-click on Serious Sam 3: BFE and select Properties . In the General tab, find the Launch Options text box. Type in: +fullscreen 0 .
The quickest way to bypass the error is to force the game to launch in a window. Once the game is running in a window, you can safely change the resolution and fullscreen settings from the options menu. Look for gfx_bLastGoodFullScreen and change it to
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Open (or recreate) GameSettings.ini and add: By forcing the game into windowed mode, you
Now get out there, Sam. Mental isn’t going to defeat himself.
Complete the installation wizard and reboot your PC to initialize the newly registered runtime variables. 2. Manually Recalibrate the Game Configuration File
This is one of the most commonly cited and effective fixes. The error often appears on fresh installations of the game when a needed component is missing. An official update from 2013 addressed this issue by re-including the DirectX redistributable in the build. However, sometimes you need to trigger the installation manually.