All memes aside I love when a game/movie/book starts mixing real history/science with fiction, in a way that makes me start questioning my own knowledge or wondering if some of the fictional parts are actually true. As examples I'd say MGS3 does this a lot at the start and so does 999. On the anime side Baki does it all the time, as does Jojo occasionally.
I also did a lot of research on this and apparently there is no nomenclature for this type of writing. If it were up to me I'd call it hyperrealism.