I'm surprised no one here has mentioned Assassin's Creed yet. All conflict in history stems from two competing ideological sects of callous murderers who wanton manipulate populations into doing their bidding and for some reason one side in this conflict is supposed to be the moral superior of the other. Also some of the supplemental material is batshit and basically just a way for the devs to denote certain historical figures as good or bad depending on what organization they belonged to. All other conflicts are secondary to the overarching philosophical differences of two sects competing for magical thingies.
At the same time those games have probably the most sympathetic portrayal of Marx in a western piece of fiction, so there's that.