Set Display Mode: Serious Sam 3 Cannot
Serious Sam 3: "Cannot set display mode" Error on Launch
The game engine (Serious Engine 3.5) fails to initialize a compatible DirectX or OpenGL display mode due to: serious sam 3 cannot set display mode
If the game can't start because it’s trying to use an unsupported resolution, you can force it into windowed mode or a specific resolution via the .ini file. Serious Sam 3: "Cannot set display mode" Error