Speaking to The Guardian about storytelling in games, Heavy Rain director Cage singled out the FPS genre -- its use of WWII and sci-fi settings in general -- as an example where that aspect of the medium is stagnating. His advice for other game writers: " Don't write about being a rookie soldier in WWII, because you don't have a clue what that's like."

Heavy Rain has drawn accolades, Cage says, because the inspiration for its story is personal and relatable. "Talk about yourself, your life, your emotions, the people around you, what you like, what you hate," he advised. "This is how the industry will make a huge step forward. I'm fed up with space marines."

In his case, inspiration came from something much more down to earth. "It was not about space marines fighting aliens, it was about my relationship with my first son and how he changed my life -- and also about how loving someone without expecting anything in return was something totally new."

So, Modern Warfare 3 writers: instead of "how many people can you shoot?," why not try asking players "how many people would you shoot to save someone you love?"