Having just endured the train wreck that was Far Cry 3's narrative arc, now's the perfect time to look at this guide by GameFront on how to write a story for a video game.
It may look like a joke (and because it is a joke, it gets a little wonky in parts), but think about the story to a game you've played in the last five years, then see if it breaks this chart.
How To Write a Game Story (INFOGRAPHIC) [GameFront](pic by Hellstern)