OKAY THIS HAS SPOILERS DON'T READ BEFORE PLAYING THE GAME
Found this by happenstance through Tumblr and WOW, I'm floored! It's so good!! You managed to pin down the difficult writing style of FL to deliver such a great story :)
The idea of using a piece of meta-narrative like Brass Lollipops as the inciting incident for the story is simply one of the smartest writing moves I've seen in A Long While, and something that fits perfectly as a piece of fan content in the best way possible, allowing you to play with it in a way that I just don't think would be possible as official content (even though it WOULD fit in there perfectly, someone get Hannah on this asap).
And what a piece of art at that !! The story was soooo interesting and it makes so much sense within the world of FL, even touching on some of the world's common underlying themes like the dangers of unabashed capitalism and the rigid societal structure of the era.
AND you managed to introduce so many of FL's factions too! I loooove our "Sherlock", his behaviour and relationships (the small snippet about the rat he befriended is probably one of my favourite parts of the entire piece...) and his subjects of study as well! The monsters were so cool and gross and detailed! I want to lovingly tuck him into my Companions tab. We saw less of the devil (I'm going to replay it immediately after writing this comment just to know more about their relationship, but my MC just wouldn't have commented about it and I wanted to be true to them on my first playthrough </3) but I still found her very interesting. The image of her and her hell worm vs the big amalgamation was so crystal clear in my mind when reading your writing -- no better sign of good prose imo.
Just remarking again on your cool vultures now that I'm going to rave about supporting cast. I actually laughed out loud at 1) Mrs Plenty knowing the skeleton was an obvious forgery but being interested in it regardless and 2) the Rubbery with an eye patch counting on its own after the brawl, but all throughout the story your sense of humor is so prevalent and so fitting (I will say this a thousand times -- the tone is SO fitting to the world it's crazy good) and your characters are a big pillar of that. Can't believe I got to meet THE Merrigan himself!! And that he's so cool!! I'm sure the calligraphy with which Amos wrote me in his little black book is picture perfect.
Anyway what a labour of love :) It irradiates from each paragraph of the piece. I'm so grateful to having found it, you're a fantastic writer. I'm off to enjoying it again :)