I wasn't thinking about it 'Universal Monsters' style but I have frameworks for both a werewolf game and a Frankenstein game. The werewolf game has an invisible game that runs in the background that determines what the werewolf is doing in the dark and how it affects you as the unknowing human side of things. Probably set in a specific village during the Thirty Years War.
The Frankenstein game ain't worth talking about yet.
The next two projects I hope to get out, though, are a game about becoming a lighthouse keeper and a game about soap carving. The latter is the best, most grueling game I've ever made. It uses a deck of cards and needs to be kickstarted and will happen this summer if the world isn't on fire.
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I'm more of a fantasy or supernatural kind of guy so soap carving and lighthouses aren't really my thing lol. But definitely unique at least! Really like that werewolf idea and will gladly throw some money at it if it ever hits release though.
Either way I think you've got a great system here that you can build off of. Even expansions could work where you roll a 1d3 and read from the new book on a roll of 1 in addition to or instead of the original prompt.