You may well be seeing adventure after third-party designed adventure for it, Kickstarter after Kickstarter, that look to be packed with great art and gritty atmosphere. I know I do. But you may have no one who wants to play the RPG with you.
Solitary Defilement from 1d10+5 is a solution. The free download contains comprehensive rules for exploring the dying lands and end of the world by yourself. And that seems fitting.
There are several downloads available from 1d10+5’s Itch store. The free Solitary Defilement rules, a crawlsheet, microcrawls, a roadmap and a worldmap. These will be used to help guide your solo adventure.
The adaptation includes a Moves reference, Oracles and an extended gameplay example.
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