Writing up a campaign into a module -- could I, should I, how do I?

Last week I went to a cabin with 4 friends for 4 days and we played an adventure/mini-campaign I developed for them for about 10 hours a day.

The key idea is it was a political thriller set in a conclave where Mages vied to become the Demiurge Millenial who dreams the shape of the next thousand years. There’s a murder, a conspiracy that spills out into an Imagined City floating on the edge of creation, and hidden lore lost in ages past. One fun innovation was to have the City physically change based on the vision of who was currently set to win the election: this meant I could lock clues in other versions of reality, and the PCs had to play politics to find all the pieces of the puzzle.
It was a semi-sandbox, with four magical factions to support or hinder, 12 city locations which each existed in different forms in 5 different realities, 4 ancient mysteries hidden in far-flung sites, and 6 possible ways to resolve the conspiracy using different puzzle pieces.

It was a big success, and now I’m being told I should write it up into a module. I have my notes as a basis of course, but I feel a bit overwhelmed at the prospect of actually writing up such a project in a polished form, and am well aware of the 80-20 rule…

I suppose this post is both me trying to work out if anyone else would want to read/play something like this, and also get some practical advice of how to get a minimum viable product together before I burn out.
System is also giving me a headache – I ran this in a slightly homebrewed version of Worlds Without Number, so its OSR-ish, but it has a gaslight-london type setting so I dont think you could just roll up a Cairn character or something like that. Ideally I’d publish it system agnostic with some guidance on PC power level, but would that hinder interest a lot?

Thanks for any and all thoughts!

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Before I begin, I have made some modules and helped friends make modules for the first time. I would go for it! Just set your goal to just do this for yourself. You clearly have a cool piece of art in mind and putting that out into the world is a beautiful thing to do. This can very much just be an extension of your ttrpg hobby.

As for the module itself, it sounds cool to me. I think we need more mystery/puzzle modules. The setting seems rad too. You could probably get away with agnostic, but Troika might be a perfect fit.

In my opinion you can’t go wrong trying to emulate the formatting of Merry Mushmen adventures. They are my gold standard for usability at the table, appropriate detail, and beauty.

Not a fan of system agnostic, personally. Pick a system and folks will convert to their own if it seems good. It also helps with how you market it; OSE will get you into Gavin’s newsletter, Cairn into mine, and so on.

You might also look into partnering with a publisher to help you develop it, especially if you’re planning to print it and don’t want to rely on PoD.

Check out this resource library as well:

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