Anyway, D&D actually does have some pretty strong tonal consistencies:
1) There may be internal conflicts, but most conflicts are external
2) There is a group of protagonists with a found family dynamic
3) Protagonists grow in their skill and impressiveness
4) At least some problems can be solved through violence
5) There is a fantastic but threatening world that the protagonists engage with
If these seem too obvious to state it’s because they (or something very close) are how almost all trad roleplaying games and almost all (other) geek episodic media works. But it’s not trivial and leaning on this is part of why say Stranger Things works so well as a selling point; it’s not just that it’s a background detail but that ST is tonally consistent with the logic of the game itself.
(And obviously this is all consistent with basically any MPAA rating.)