Video games are a unique entertainment medium. Whereas movies, books, and television typically use their sequels to continue a story, video game sequels are more often defined by a continuation of themes and gameplay elements. While some games certainly have a continuous story, it isn’t story alone that keeps players coming back time after time; it’s that combination of story, along with series staples like themes and gameplay, that intrigues new and returning players alike. Few better examples of this…