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Coriolis - The Third Horizon core book
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Coriolis - The Third Horizon core book

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“I’m getting a signal.” Dalil’s voice crackled over the com. “We’re close.” The navigator gazed into the darkness ahead, his face ghostly pale in the cold glow from the tabula in his hands.

Radwa nodded silently for her comrades to advance, approaching the strange ruins in the moonscape. The only sound they could hear was their own breathing through the air filters, and the soft crunch under their boots.The floodlights from the freighter Narzalus behind them cast long shadows of the trio.

“Something is wrong, boss.” The sharp voice of Jhara broke the silence. Her vulcan rifle hummed as the tall woman from Sadaal activated her weapon. Without turning, Radwa raised her hand to still her friend.

“Easy, Jha,” she whispered over the com.

The explorers shone their suit-mounted flashlights over the ruins. Alien signs were carved into the smooth dark surfaces. In the light, they seemed to be glowing.

Something slowly unraveled before them. A darkness rose from the surface of the dead moon, reaching towards the starry sky above them.

“Mercy of the Icons!” Radwa gasped, and felt a chill spread throughout her body.

Coriolis – The Third Horizon is a science fiction role-playing game from the makers of critically acclaimed Mutant: Year Zero (six-time nominee and winner of a Silver Ennie for Best Rules 2015).


  • Create your unique player character – including skills, talents, gear and relationships – in mere minutes.
  • Fight fast and furious battles, praying to the Icons to overcome your enemies.
  • Build and crew your own spaceship, to explore the many star systems of the Third Horizon.
  • Experience thrilling spaceship duels, using a game system that puts all player characters at the heart of the action.
  • Take part in the intrigue between powerful factions on the majestic space station Coriolis.
  • Uncover the mysteries of the Third Horizon, a rich tapestry of cultures that have settled the stars.

“The game's authors describe it as ‘Arabian Nights in space’ and it fulfills that brief marvelously. Style 5/5, Substance 5/5.”

– RPG.NET Review

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Reviews (4)
Discussions (12)
Customer avatar
Levon J September 01, 2017 3:33 pm UTC
It looks like they've dramatically reduced the file size and it's loading much quicker now! I'm happy because I've been meaning to sink my teeth into this for months.
Customer avatar
Darren F August 24, 2017 7:08 pm UTC
This pdf really could do with a printer friendly version like some of the others that have been released, my tablet struggles with it.
Customer avatar
Nils K September 05, 2017 3:26 pm UTC
We've uploaded a much improved PDF now, 37 mb makes it pretty speedy on tablets. Sorry for the hassle!
/Nils of Free League
Customer avatar
Charles M June 06, 2017 3:40 pm UTC
The rules look to be a big improvement over Mutant Year Zero. The game world for the Third Horizon is very well described and interesting.

This would make a beautifully rendered book... but it makes a crap PDF.

It's just too big.

There are a Table of Contents, and an Index, but they aren't hyperlinked, so they are a lot less useful than they could be.

I tried the PDF in five different readers: Moon+, Foxit, Sumatra(PC), EZ PDF, and Adobe Reader. Bookmarks only worked in Adobe and EZ PDF. In all of the readers it took between three and eight second to load a page. Once a page was loaded response times were better but still _slow_.

Honestly, if I drop $25 on a PDF, I expect it to load quickly, have working bookmarks, and be fully hyperlinked.
Customer avatar
Nils K September 05, 2017 3:27 pm UTC
Sorry for your problems with the size of the PDF, and indeed it was too big. We have re-exported the PDF and optimised it much better so it should be very usable now.

/Nils of Free League
Customer avatar
Matt K April 30, 2017 10:25 pm UTC
You guys really need to give DTRPG coupons for the game to your KS backers who have it on PDF already, so we can actually rate and review the product on here and help spread the word about how awesome this game is. Only 5 ratings and 2 official reviews is scandalous! Same goes for the Atlas.
Customer avatar
March 15, 2017 2:28 am UTC
How extensive is the "watermarking" in the .pdf? Does it inhibit relying on the .pdf for running the game, and/or for printing select pages? Thanks...
Customer avatar
Mark P March 15, 2017 4:03 pm UTC
When DriveThru indicates a 'watermarked PDF' it basically means that your name and order number will appear in the bottom corner of each page (or maybe just the left-hand pages, I can't recall) throughout the PDF. Some publishers do this prevent piracy/file-sharing.
Customer avatar
March 15, 2017 9:51 pm UTC
Great - thanks for that helpful clarification. Much more benign than I'd feared!
Customer avatar
Jeffrey Corey L March 07, 2017 8:18 am UTC
One last question, I see this system uses a card deck. Are these cards required or will a standard card deck work, but just not look as cool? :)
Customer avatar
Luke W March 07, 2017 8:38 am UTC
They are not required. But they can't be replicated by normal cards.
Customer avatar
Jeffrey Corey L March 07, 2017 8:13 am UTC
Does this system and Mutant Year Zero share the same d6 dice mechanic?
Customer avatar
Luke W March 07, 2017 8:39 am UTC
They are similar but Coriolis doesn't have different results on a 1 depending on the source of the dice. Overall Coriolis feels more streamlined.
Customer avatar
Luke W March 07, 2017 8:39 am UTC
They are similar but Coriolis doesn't have different results on a 1 depending on the source of the dice. Overall Coriolis feels more streamlined.
Customer avatar
Todor P February 24, 2017 9:10 pm UTC
Quick question - can a ship be operated normally if your party has just 2 guys in it?
Customer avatar
Tomas H February 25, 2017 1:44 pm UTC
Hi! There are special rules for small crews in Chapter 7 of the rulebook. :)
Customer avatar
Todor P February 26, 2017 2:54 pm UTC
Thanks a bunch! I already asked on the FBook group and got a reply there! My next paycheck can't come soon enough! Going for the physical book though. Thanks once again!
Customer avatar
Thomas K February 14, 2017 12:01 pm UTC
It would be great if a Low Quality file of the rulebook was added.
The rulebook pdf is rather heavy on the resources if used on an old Pad.
Customer avatar
Trung B March 11, 2017 12:36 am UTC
Ditto on this!
Customer avatar
Levon J July 09, 2017 6:30 pm UTC
i wish i'd read this review. pdf is really difficult to read on my android talet.
Customer avatar
Harm-Diercks G July 11, 2017 10:35 am UTC
I had the same Problem, I reduced the Size of the PDF. All the graphics were compressed to hell but it is much more enjoyable on Android tablets. For the awesome artwork I use my printed kickstarter book.
Customer avatar
February 12, 2017 8:38 pm UTC
I got this as a KS backer, but only because one of my group wanted me to run it. So I read it without prejudice, and this is my unbiased review. In comments because I didn't purchase it on DriveThru

This is an English Language version of a Swedish game, published by Fria Ligan, a company set up when the original developers of the first version of Coriolis folded. Fria Ligan are gamers and part-time developers/publishers, who include a surgeon, and the artist of the moment Stålenhag. Though set up to support Coriolis, their first ruleset was Mutant Year Zero, later published in English by Modiphius. This English language version of Coriolis is also distributed in partnership with Modiphius.

It's a big book at 388 pages. I'm not entirely convinced by full colour layout of text heavy books - I prefer white pages, but the design isn't over-fussy, and despite the text being held in graphic frames, it's very readable.

The usual what is an RPG gumph is followed by a section titled...See more
Customer avatar
J.T. D February 13, 2017 11:30 pm UTC
Excellent and thorough review!
Customer avatar
Sam H March 31, 2017 2:23 pm UTC
Amazing review! Now put it under the review tab!
Customer avatar
April 08, 2017 9:59 pm UTC
I can't. I didn't buy it through DriveThru
Customer avatar
Scott N February 11, 2017 4:14 pm UTC
When are the books or PODS going to be available?
Customer avatar
Luke W February 11, 2017 5:51 pm UTC
It is already available:
Customer avatar
J.T. D February 09, 2017 7:55 am UTC
Is the PDF for the core rulebook any different than the one that was released for Kickstarter backers? And if so, will Kickstarter backers be receiving the updated PDF free? (I'm asking because I was a backer.)

Also, I LOVE this game and would rate and review it with 5 stars if I could, but unfortunately this site doesn't let you unless you purchase the product through them. :/
Customer avatar
Chris B February 09, 2017 6:58 pm UTC
It's exactly the same :-)
Customer avatar
J.T. D February 10, 2017 8:17 am UTC
Oops! I found out today that there was an e-mail that provided the updated books to backers already, but somehow I didn't get mine or maybe deleted it by accident. Not to worry, though - I found the links for backer on the Kickstarter! :)
Customer avatar
Tomas H February 10, 2017 8:34 am UTC
Hi! Yes, the final PDF was sent to backers via a Kickstarter update a few days ago. /Tomas, Free League Publishing
Customer avatar
Dani J February 11, 2017 4:22 am UTC
Well nevertheless, you could write a review on the comment page -Just saying. I'm backer myself, and the content of the books looks amazing except there's some problems when reading with application other than Adobe reader. Cyan colored main content layout goes from yellow, pink to dark brownish hue some times. I hope they'd fix that. It hinders reading.
Customer avatar
J.T. D February 12, 2017 2:15 pm UTC
Good idea, I may write up a review in the comments in the near future. I use Foxit Reader for PDFs and have not experienced the issues to which you're referring.
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File Last Updated:
August 31, 2017
This title was added to our catalog on February 08, 2017.