For the past two months, I've been writing, and posting, roughly two thousand words a day of "Myou've Gotta be Kidding Me", a story set in a "My Little Pony: Friendship is Magic" fanfic universe, "Chess Game of the Gods". Outside of the sheer NaNoWriMo-like exercise of pushing out near-daily chapters, I've also been trying to keep in mind the various principles I've learned from Yudkowsky and LessWrong, and to try to present them in a way that people who like reading MLP fanfics might be able to appreciate.
I've just come to something of a minor climax with chapter 60, and while I'll definitely be continuing the story, this seems like a good time to mention it here, for whatever feedback and constructive criticism anyone cares to offer.
I have read all of the original. It is a very well written work, but as befits Fallout, it is grimdark.
There were many parts which seemed like they wouldn't have been nearly as enjoyable without strong familiarity with the Fallout universe. They cross it with MLP very well- some of the combinations are eh, but several of them make perfect sense, and are very tragic.
I'm not quite sure I would describe it as "rationalist"- the protagonist is clever, the enemies are often clever, and there's a little bit in the way of plotting and puzzle solving. It seems much more like a standard post-apocalyptic adventure than rationalist fiction, but I'm not quite sure where I would draw the line around rationalist fiction.
Rationalist fiction: There's explicit epistemic or instrumental methods which you see the characters using, described in sufficient detail to convey the general principle as well as the particular case, which you are meant to pick up and use in real life.