Some parts of this campaign rely on ScreenFlashes to be enabled, make sure you enable them before you start playing!

Take the following steps to enable ScreenFlashes:

1.) Open your Unreal.ini file in your System folder with notepad
2.) Look for a section called [WinDrv.WindowsClient]
3.) Look for ScreenFlashes and make sure it is set to True
4.) Save your Unreal.ini when prompted

Have fun!