That they do so has many reasons that are totally unconnected with everything they represent, economic ones foremost, but also the need to meet genre- and audience-imposed expectations as well as technical limitations. Civilization (I – V), Age of Empires (I – IV), Anno (5 pts.), Monkey Island (5 pts.), Total War (7 pts.), Assassin’s Creed (I – IV), to name but a few, are heavily serialized in that they all, save for their respective first incarnations, point continuously to the other titles in their series’, be it on a structural level or with regard to content.
Video games that feature historical content – what I term ‘historicizing’ video games – often come in series.
