Making a game M (or 18+) doesn't immediately enrich it's story. CoD is M and has laughably no important story, ever. The game I always like to harken people back to when they talk like this... Shadow of the Colossus is rated T. One of the best stories ever. It's not the rating that made an underperforming game. It was just Bungie. [spoiler]Sorry Bungie, love you guys[/spoiler]