"All games tell stories. Unlike other media (books, television, film), the interactivity puts the player in the role of protagonist. Writing games can be quite complex and involve more than characters and dialogue. To get a better understanding, read this article by Darby McDevitt, lead writer of Assassin's Creed. He explains the prewriting and production process. Students should be surprised (as was I!) at how sophisticated game writing is."
Via John Evans