How can I enable my GameClasses.h file to include other header files automatically?

The ShooterGameClasses.h file include many other header files, and ShooterGame.h include ShooterGameClasses.h.

So any cpp files which includes ShooterGame.h will have access to all the other classes such as AShooterPlayerController.

You can not modify the GameClasses.h manually, so how to enable my GameClasses.h file include other header files automaticlly.

Thanks!