Introduction to Game Design Manuals - Game Design Manuals can be as small as a drawing, or dozens of pages long - filled with stories, interesting character plot lines, and crazy areas - and it all starts with knowing how to create your own game design manual.
Introduction to Game Overview page - What is your game all about, why should it be made - this page is vitally important in creating that whole game philosophy.
Introduction to Game Worlds - No matter what you are doing, all games have stories and it all starts with the stories within different areas - so it is vitally important to think about all the areas in your game to create the most robust story you can create.
Introduction to Characters - after you create the areas, than you can think about the next step in story, characters, and their motivations, ambitions, their past, side missions and all kinds of other things, so you can start to understand how they will respond to the environment.
Introduction to Stories - After you look at the areas and the characters, you start to realize the whole story, where characters are reacting to the stories within areas and to each other, where protagonists and antagonists are constantly fighting against each other.