Press Alt + Enter
Press F11
Check the game’s video or display settings
Set display mode to Fullscreen
Set resolution to your monitor’s native resolution
Disable windowed or borderless windowed mode
Use the game launcher’s display options
Update your graphics drivers
Restart the game after changing settings
Check Windows display scaling settings
Disable overlays if fullscreen is not working
Try running the game as administrator
Use the game’s config file to change display mode
Verify the game supports fullscreen mode
Check monitor settings if the game opens on the wrong screen