Advanced Search

Hostile Rules
Quick Preview
Full‑size Preview

Hostile Rules


Welcome to the gritty, retro-future universe of HOSTILE which now expands with its own, dedicated rulebook. Based on the Cepheus Engine, these Rules add in the realistic combat rules from Zozer Games’ popular Modern War game, as well as setting-specific rules from some of the eighteen HOSTILE supplements. When combined with its companion book, the HOSTILE Setting, you will have a complete, stand-alone, retro-future sci-fi game. Please look out for the HOSTILE Double Shift Bundle which gives you these HOSTILE Rules as well as the HOSTILE Setting book, at a 20% discount off of the listed price.

HOSTILE  is a gritty, near future roleplaying setting that is inspired by movies like Outland, Bladerunner and Alien. It is a universe of mining installations, harsh moons, industrial facilities, hostile planets and brutal, utilitarian spacecraft.

A printer-friendly white background option is also included with your purchase.

  • Comprehensive task resolution mechanics
  • An expanded character creation system, with a non-random character design option
  • Survival rules from deserts to radiation, deep sea diving to acid … and more
  • Stress and panic rules
  • Starship combat mechanics
  • Tactical combat rules that include area fire, aimed fire and vehicle combat
  • Handling friendly NPC teams and squads
  • Spaceflight operation and procedure guidelines
  • Advice and guidance on interpreting the world data
  • Trade, speculation and salvaging
  • Encounter tables: in space, on planet, within colonies and at the starport
  • A full chapter of referee advice on running HOSTILE
  • With a variety of realistic photo-illustrations and replica documents
  • Full colour throughout!

You might also be interested in the Hostile Referee's Screen, available as a PDF download

Bundles containing this product:
 Customers Who Bought this Title also Purchased
Reviews (0)
Discussions (7)
Customer avatar
Paul E January 05, 2022 4:28 pm UTC
Hi Jeremy, that’s a good question. Here is what the book contains:

Character Career Pages (from Setting book)
Skills (from Setting book)
Temperate/Hostile Atmospheres/Hunger/Fatigue (from Dirtside)
Pressure Loss (from Setting)
Climbing, Comms & Movement (from Modern War)
Desert & Arctic Survival (from Dirtside)
Combat (rewritten from Modern War)
Space Travel chapter (80% rewritten from Crew Expendable procedures)
World Data (descriptive data rewritten from Universal World Profile)
Encounters (half of tables from Crew Expendable)
Travelling Across Planets (Procedure from Dirtside)

What is Roleplaying
How Hostile Works
Game Terminology
Game System Chapter
Character Creation Rules (Random & Chosen)
Stress & Panic, Acid/Hiking/Fire/Falling/Disease/Poison/Suffocation
Zero G Operations...See more
Customer avatar
jeremy W January 05, 2022 12:20 am UTC
Is there a list of what supplement content has been included in the rule set? i don't want to buy redundant content when that money could go towards other supplements.
Customer avatar
Paul E December 26, 2021 8:22 am UTC
Errata: Watch out for the vehicle damage example on page 111. The damage assigned to the AV-105 gunship does not refer to the Penetration Table just above, as it should.
Customer avatar
Warren E January 03, 2022 11:16 am UTC
So was it corrected in version 2?
Customer avatar
Paul E January 03, 2022 4:56 pm UTC
The current version, v5 is available for download and includes a corrected example.
Customer avatar
Paul E January 03, 2022 7:20 pm UTC
... I do apologise, I meant to say the new Rules version, v2, is available for download and includes a corrected example. .... I am mixing up my Rules with my Setting book!
Customer avatar
Andrew T December 22, 2021 7:26 pm UTC
Free pdf if we buy the physical book?
Customer avatar
Paul E December 22, 2021 9:25 pm UTC
Yes, have a look at the book description on the Lulu Publishing website (direct linking not allowed here). It gives contact details you can use to request the PDF. We’ll ask you to forward us your Lulu receipt.
Customer avatar
Paul B December 18, 2021 3:03 pm UTC
Heck yeah! I just looked and out of 66 Zozer books (not counting Star Trader or Double Shift) I’ve already got 54, all PDFs so far and very happy to support your work. This one I’m getting a physical copy and it would be lonely without its mate, one package for the same reason as Chaotic G :)
Customer avatar
Chaotic G December 17, 2021 6:56 pm UTC
Poop. I just purchased Hostile Setting on Lulu last night. I would have waited and snagged a hard copy of that too if I knew the rulebook was releasing 12 hours later. I suck at the internet.
Customer avatar
Paul E December 17, 2021 9:47 pm UTC
Hi, unfortunately, Lulu don’t offer any way to bundle books together, like Drivethru do …. so you haven't missed out on any discount being offered. I hope that makes you feel a bit better!
Customer avatar
Chaotic G December 18, 2021 1:55 am UTC
Hey, Paul. I'm mostly bummed out about paying for shipping twice. That and one package is way easier to explain to my wife than two. =)
Customer avatar
Paul E December 18, 2021 8:01 am UTC
That's a good point..
Customer avatar
Andy L December 17, 2021 5:47 pm UTC
I’m glad to see this. It’s a little confounding to piece together all the disparate and relevant Cepheus / Traveller rules to play Hostile. Having a definitive rule source is super welcome. For those of us that pulled the “early shift” and already own a lot of Hostile stuff, including the Hostile setting book, any chance for a discount? Looking forward to stressing my party out with some more “contact lost…” and “core reactor meltdown imminent…” moments. Thanks for all the hard work.
Customer avatar
Matthew M December 17, 2021 7:12 pm UTC
I will second that, already have quite the collection and I am eyeballing the hardcopy on lulu.
Customer avatar
Paul E December 17, 2021 9:49 pm UTC
I’ll have a look into that later today, and try to get back to you tomorrow, Andy.
Customer avatar
Stephen H December 18, 2021 12:39 am UTC
I agree. As a long time supporter, it’s be nice to get a deal on a bundle.
Customer avatar
Paul E December 18, 2021 8:05 am UTC
Hi, we estimate that 95% of the book's sales will go to people who already have the Setting book. It is aimed at those particular customers of Zozer Games. So discounting nearly every book doesn't sound viable - the book was in production on-and-off for almost a year and a half. Sorry Andy, of course the PDF is free if you decide to get the softback or hardback from Lulu...
Customer avatar
Andy L December 18, 2021 6:30 pm UTC
No worries, Paul. I appreciate you even looking in to it. I am not upset about paying you for your work. It just never hurts to ask! The bonus pdf with physical copies is good to know. Thanks!
Browse Categories
 Follow Your Favorites!
NotificationsSign in to get custom notifications of new products!
 Recent History

Product Information
Electrum seller
Rule System(s)
File Size:
167.39 MB
Original electronic
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:
December 27, 2021
This title was added to our catalog on December 17, 2021.
Zozer Games
Publisher Average Rating