The Facility is a narrative mini-campaign for FIST centered around industrial mad science. Honestly it feels a bit like a Half Life mod, but not in a bad way.
The PDF is 10 pages, with text blocks and a few pictures. The text blocks are dense and cluttered, and most sentences are either a little short on punctuation or a little run-on, making them tricky to read.
The plot of The Facility isn't communicated in detail to the GM or players, but it's fun and atmospheric in the same way as something like F.E.A.R.. The players are born in a lab and sent to die in a city. Said city is a Silent Hill style hub for a surprising number of different spooky locations. Revisiting a single location enough times sends the players to the titular Facility and triggers the endgame.
For GMs that like a kind of violent FPS dreamlogic, this is a good match. The players will ultimately make meaning out of it on their own, however you may have to occasionally push them to hit certain key event triggers to keep them moving through the plot.
In addition to the mini-campaign, The Facility also has a bunch of new items, TRAITS, and enemies. In general, they're all very flavorful, and directions are given to let the players develop more TRAITS if the custom enemies feel too powerful.
As far as useability goes, the way this is written makes it pretty hard to read, but its contents are sorted into different chapters, and there's a page for GM's notes at the end---which is a really nice touch.
Overall, if you hunger for old 2000s era FPS and want a FIST campaign that channels that, give The Facility a try. It's a little tricky to read, but it's got a lot of heart.