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The Third SectorClick to magnify

The Third Sector


A complete sandbox campaign for the Mothership Sci-Fi Horror RPG or your favorite Sci-Fi RPG system.

This pamphlet supplement ties twelve 3rd party Mothership adventures together for convenient use in sandbox campaign play. It features:

  • A gorgeous pixel art map keyed with all included adventure locations plus extra points of interest to fill in with your own material.
  • Hooks, rumors, and clues that create a robust web of connections between adventures and reward exploration.
  • job table modified by the party's local reputation. Pursue notoriety or credibility to gain lucrative pirate or corporate contracts.
  • Warden advice for running a sandbox campaign in Mothership.

This sandbox campaign includes locations from the following adventures:

  • Alcor Station
  • Bloom
  • Diminishing Returns
  • Dinoplex: Cataclysm
  • Echoes in the Graveyard
  • Green Tomb
  • Moonbase Blues
  • Primeval
  • The Black Heart of Paradise
  • The Black Pyramid
  • The Last Nebula
  • Welcome to ERF

A B&W tri-fold pamphlet. Includes both standard B&W and print-friendly PDFs.
Compatible with Mothership 1st Edition.
Made entirely by humans.

Physical Copies Available!

Buy directly from our own Anodyne Printware Store or another of your favorite indie webstores, including:

  • Tuesday Knight Games (US)
  • Exalted Funeral (US)
  • Ratti Incantati (CA)


Written by Ian Yusem
Layout by Eric K. Hill
Art by Ribston Pippin

Published by Anodyne Printware


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Discussions (3)
Customer avatar
Shaun S December 25, 2022 3:01 am UTC
Tuesday Knight would have a great opportunity to put together a bundle deal on these adventures, especially since those of us who have some of them would only have to pay for the ones we still need.
Customer avatar
Michael T October 27, 2022 4:03 pm UTC
I can't seem to locate "Last Nebula" either....
Customer avatar
Ziga P August 30, 2023 8:04 am UTC
The Last Nebula is available on
Customer avatar
Michael T October 26, 2022 6:47 pm UTC
What is "Diminishing Returns"? It doesn't seem to be on Drivegthru.
Customer avatar
Ziga P August 30, 2023 7:54 am UTC
Diminishing Returns by Skull Dixon is available on
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Product Information
Gold seller
Rule System(s)
File Size:
6.54 MB
Original electronic Click for more information
Scanned image
These products were created by scanning an original printed edition. Most older books are in scanned image format because original digital layout files never existed or were no longer available from the publisher.

For PDF download editions, each page has been run through Optical Character Recognition (OCR) software to attempt to decipher the printed text. The result of this OCR process is placed invisibly behind the picture of each scanned page, to allow for text searching. However, any text in a given book set on a graphical background or in handwritten fonts would most likely not be picked up by the OCR software, and is therefore not searchable. Also, a few larger books may be resampled to fit into the system, and may not have this searchable text background.

For printed books, we have performed high-resolution scans of an original hardcopy of the book. We essentially digitally re-master the book. Unfortunately, the resulting quality of these books is not as high. It's the problem of making a copy of a copy. The text is fine for reading, but illustration work starts to run dark, pixellating and/or losing shades of grey. Moiré patterns may develop in photos. We mark clearly which print titles come from scanned image books so that you can make an informed purchase decision about the quality of what you will receive.
Original electronic format
These ebooks were created from the original electronic layout files, and therefore are fully text searchable. Also, their file size tends to be smaller than scanned image books. Most newer books are in the original electronic format. Both download and print editions of such books should be high quality.
File Last Updated:
August 29, 2023
This title was added to our catalog on January 21, 2021.