Games most of the time tend to keep things fairly cut and dry. In that way things are transparent for the player, and more often than not the choices are very easily discernible from one another. It's either "Saintly Hero" or "Heartless Monster."
Everything that has ever been made has been influenced by something and games are no exception. Discovering these influences can bring about a new understanding and new appreciate for the game as a whole. For instance, in studying film noir I recently found that the Bioshock series is heavily influenced by film noir and it's various elements. From the start of the very first game you start off on a hazy plane, cigarette in hand as the main character talks briefly about his life. Its in this haze that you really start to go from guy on a plane to someone who becomes trapped within something much larger than themselves. Of course, some of these elements can be present in other forms of media as well so it wasn't absolutely definitive perhaps until much later when Bioshock Infinite: Burial at Sea Part 1 was released.