A downloadable TTRPG addon

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Please note that if you want to download all of the Rainworld PDFs, you can get them all at once in the form of The Collection.

The second in a planned set of modular, pamphlet-sized rules expansions for the Rainworld TTRPG.

Beneath New Shenzen lies the Gyre: an expanding labyrinth of contested turf which, technically, shouldn't exist. Space is power; and so the greatest power lies with the people who control the twelve Diggers, reactivated early-stage colonisation tunnel boring machines.

Gear, information, and expanded character options for Homunculoids and Mutts!

CategoryPhysical game
Rated 5.0 out of 5 stars
(2 total ratings)
AuthorCaffeinated Otter
GenreRole Playing
TagsCyberpunk, Dystopian, Sci-fi, Tabletop role-playing game


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Click download now to get access to the following files:

Underworld.pdf 700 kB
Version 11

Development log

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