Serious Sam 3 Cannot Set Display Mode

Force the game into a specific mode by right-clicking the game in Steam > Properties > General > Launch Options and entering: +gfx_bFullScreen 0 (to start in windowed mode). +gfxapi d3d11 (to force the DirectX 11 renderer). Manual Configuration (Config File Edit)

Dealing with the "Fatal Error: Cannot set display mode" in Serious Sam 3: BFE serious sam 3 cannot set display mode

Did this guide help you? If a different solution worked, sharing it in the community forums helps fellow players still stuck on the "display mode" error screen. Force the game into a specific mode by