The same parameters work. Find the executable ( SeriousSam3.exe ), create a shortcut, right-click the shortcut > Properties, and add the parameters to the "Target" line after the quotes.
The in Serious Sam 3: BFE
(try in order)
after starting in windowed mode is a known fix for artifacts. Secondary Troubleshooting DPI Scaling : Right-click the game's executable ( Properties > Compatibility > Change high DPI settings , and check Override high DPI scaling behavior Steam Launch Options serious sam 3 cannot set display mode
Replace dxlevel if unsupported; try removing it if it causes errors. The same parameters work
Locate and modify the following lines to match your monitor's native resolution and preferred mode: gfx_pixResWidth = [Your Width] (e.g., 1920) gfx_pixResHeight = [Your Height] (e.g., 1080) gfx_bFullScreen = 0; (set to 0 for windowed mode to test if it launches). Switch Graphics API 1920) gfx_pixResHeight = [Your Height] (e.g.
