A downloadable game

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This is an ashcan preview PDF

The full web SRD is available on Plerion website

This is v.0.8.1, the game is complete and playable but still in active development and tuning


Intrepid spacers ply the vastness of the Five Galaxies in search of fortune and glory.

This is Plerion, a sci-fi hack from Cairn designed to play radiant space opera.

Inspired by classic science fiction and the RPGs that emulate it, but with a more modern twist, winking at transhumanism and cyberpunk.

Plerion is an adventure game for one referee and at least one other player. Players act as hardened spacers exploring, exploiting and commerce through the vastness of space in the far future.

Sources of inspiration:

  • Classic Traveller
  • Jack Vance's Gaen Reach
  • Mass Effect
  • Becky Chambers's Wayfarer Series
  • David Brin's Uplift Series

Plerion is licensed under CC-BY-SA 4.0 and derives from Cairn by Yochai Gal and Spacer (CC BY 4.0 by Paul Umbers).

v.0.8.1 2022 by Roberto Bisceglie

StatusIn development
CategoryPhysical game
Rated 5.0 out of 5 stars
Tagsnsr, OSR, Sci-fi, Tabletop role-playing game


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Click download now to get access to the following files:

plerion_ashcan_v.0.8.4.pdf 22 MB

Development log

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