Brothers (and sisters), have you seen the Yellow Sign? This one promises to be a nice, big, fat set of RPG settings for playing games where midnight approaches, and so does the Yellow King to his throne in Lost Carcosa. It’s not going to be excessively cheap, but Pelgrane Press gives good value for the money. And they don’t like missing deadlines.
https://www.kickstarter.com/projects/1721105501/the-yellow-king-roleplaying-game-from-robin-d-laws
It took this campaign less than a day to reach not only their target but also two of their stretch goals. In fact, they did it in under 15 hours!