One-page adventure writing
A one-pager offering tips for writing one-page adventures by Josh romig. The guide is valuable for GMs who wants to write their own one-page adventure, whether for the annual jam or for their own archive.
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Wellerman – series I
Joshua Romig has been actively creating content this year, we are no releasing his first Wellerman misadventures series, which includes “Phoebe’s Song” and “Ghost Ship of Theseus,” and more.
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Gravity and Origin
Some musings on and toying with more nuanced and variable gravity rules for The Expanse TUE. I suggest allowing characters to move more effectively in typical gravities of their habitats. And suggest moving towards picking native gravity rather than cultural or faction belonging.
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Transport Union Edition is out!
The Expanse Transport Union Edition PDF rulebook, released on December 18, 2025. It updates gameplay for the decades between Babylon’s Ashes and Persepolis Rising, while maintaining original rules, the edition improves equipment details, ship combat, and includes significant lore updates. Enhanced art reflects the Expanse universe, enriching overall gameplay.
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Adventure: Phoebe’s Song
JM Romig has been at it again! He is launching his own concept too: Wellerman-stories. This is the first of these adventures, shared freely for everyone’s enjoyment. This first Wellerman adventure is perfect for your Halloween Expanse RPG session: Phoebe’s Song! Here is Josh’s introduction and description of Wellerman-stories: It…
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Winner of the 2025 One-Page Adventure Jam!
After more than a week of voting, a winner emerged: Ghost Ship of Theseus by Josh Romig! Congratulations Josh! This is a story about some very unnerving unintended side effects of Builder tech on human minds and ships. Check out the winning adventure and the other five submissions from this…
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2025 OPA Jam – post mortem
The deadline for 2025 One-Page Adventure Jam “Echoes of the Builders” has come and gone. Six submissions this year, from puzzles to potential planetary doom, the dangers of human curiosity, altered minds, and moral choices. The voting has started on Facebook. In about a week we should know the winner…
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Spaceship qualities and damage control
Some of the content of this post was originally posted with the spaceship collection update, Here they are again, together with some more untested ideas. Including a challenge test for restarting an offline reactor due to damage. Ship Qualities The Couple Reactor and Parallel Reactor qualities do the same thing…
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Opportunity and power; from above and below
Whether your players’ characters are merchants, smugglers, mercenaries, pirates, marines, scientists, or miners, they all share in largely being subservient to some political, ideological, or corporate superiors. Marines of the MCRN protect scientists on missions to the various new worlds beyond the rings, the scientists in turn serve both political…
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Tactical spaceship maps (update)
A small update of the tactical spaceship maps (found here) has been finished, as asked for by at least one person a few years back. The colours have been adjusted, and the font has been adjusted to make the damage dice code more legible. Both the print and VTT versions…
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Writing for the OPAJ: Familiarity and proficiency
Familiarity with game mechanics and a game’s setting seems like obvious prerequisites to write an adventure. I am not saying it is not. However, it is not. Not really. It takes a brave person to write an adventure for a game and world with which they may only have passing,…
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One-page adventures, design, writing and … ideas?
So, you may be considering participating in the annual one-page adventure jam. That would require you to write. Writing is a process. Trying to figure out or structure your process could lower the threshold for taking part in the jam. There are many ways to break down a process. Process…
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Spaceship collections – updated
After a reread of the space combat rules, and discussion with community members, I have realised that the starship collection previously uploaded on this site may give the wrong idea about spaceship combat with regards to serious losses. The updated versions of these files are now uploaded. The reasoning behind…
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One-Page Adventure template
To assist participants keep within the formal requirements, and to give hints and tips on form, structure, and content, we have made a Word template for one-page adventures. It is pretty self-explanatory and can be found on the Sheets and Reference page. Good luck and have fun writing up your…
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How to: One-Page Adventure Jam
On 21 August there was a workshop with Green Ronin and Ian Lemke on designing encounters and short adventures. Due to the heartless betrayal of technology, the recording was incomplete. This post then, is my short summary of what I can recall from the workshop, pertaining specifically to one-page adventures..…
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The 2025 One-Page Adventure Jam starts 1 September!
The one-page adventure jam of 2025 – “Echoes of the Builders” – runs from 1 September through 30 September. This year’s theme explores the consequences of human choices when dealing with Builder artefacts – whether in the name of research, power, survival, or profit. It is all about the hopes, risks,…
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Developing encounters: Best Practices, with Ian Lemke!
In preparation for the fifth annual one-page adventure jam The Expanse RPG Fan Community is teaming up with Green Ronin Publishing for an online session with Ian Lemke, lead developer of The Expanse Roleplaying Game. The 90-minute workshop will discuss the creative and practical process of developing and designing new…
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A Trilogy of Adventures
It is a pleasure to present the Tycho Trilogy by Richard Kirke. The three adventures were originally sessions of The Expanse RPG that Richard ran with his online group during the Covid lockdown in 2020. First uploaded to the Facebook community back in 2020, this PDF collects all three adventures…
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OPAJ Live-stream and Volume 4 Release!
Today marks the day! The Green Ronin Live-stream with Green Ronin’s own Expanse RPG developer Ian Lemke, Troy Hewitt and Dylan Templar also from Green Ronin, Expanse RPG community contributor Josh Romig, yours truly, and of course, the winner of this year’s jam: Mark Stout! To mark the occasion we…
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Final hours: The Expanse TUE
We are entering the last hours of The Expanse Transport Union Edition crowdfunding campaign over on BakerKit: https://greenron.in/Theexpanse We unlocked six new worlds beyond the ring today, only two stretchgoals are left: music and enounter maps! Green Ronin also added a lush special edition cover of the new rulebook, add-ons…
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We have a winner!
The winner of the 2024 One-page Adventure Jam event is: Mark Stout with his entry “Tides of Misfortune”. Now starts the planning of the live-stream with Green Ronin Publishing and Ian Lemke, the line developer for The Expanse RPG. To stay updated on this event watch this space, or follow…
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Live-stream OPAJ24 Review
Disembodied Troy of Green Ronin Publishing asked me to join him today and talk about the Expanse RPG Fan community, the one-page adventure jam, running communities, and reviewing this year’s submission! Have a look-see! And do not forget to check out the Backerkit for the Expanse Transport Union Edition, it…
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Music coming to the Expanse RPG?
Check it out! Hot off the press! The Backerkit campaign for the new Transport Union edition of the Expanse RPG, and its numerous companion products (including miniatures) has just added several more stretch goals! Not only pledge-based, but also backer- and social media-share based! The new pledge-based stretch goals include…
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OPAJ24 is over: a one-page adventure jam post mortem.
Monday 30 September the One-page Adventure Jam of 2024 “Under Falling Skies” ended. The deadline has passed and we have four good submissions this year! One submitted via e-mail and three uploaded directly to the GM group on Facebook. The submissions are already in the beautification process and a PDF…
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Last day!
These are the final hours of the 2024 One-page Adventure Jam! Get your one-page adventure finished and submitted! Giveaways and a live-play await those who participate! And the community benefits most of all! More adventures, more ideas, just simply more for everyone! Also, Do not forget to check out the…
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One-page Adventure Jam 2024: Final week!
We are entering the final week of the 2024 One-page Adventure Jam! An anniversary, work, and family has kept me away from updating and keeping on top of things. However, the community has been active and submissions are trickled in and more as reportedly on the way! It is not…
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Giveaways for one-page adventure jam participants!
This year the one-page adventure jam comes with six (6) giveaways divided between two (2) products. Submissions are coming in, it still not too late to join the jam! Get yours in by 30 September! Three lucky participants will receive a copy of the Trades of the Expanse Trader/Smuggler PDF.…
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It-just-dropped-mini-review: Pirate
Pirates. Those pesky pirates. If you cannot beat them, join them, or better yet, gather your mates and start your own little personal war against conformity! Trades of the Expanse: Pirate is now out! You can find on the Green Ronin store and on DTRPG. Pirate offers what we have…
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Announcement: 2024 One-page Adventure Jam!
The One-page Adventure Jam of 2024 starts 1 September! This year’s jam is titled “Under Falling Skies”! It is all about how Marco Inaros’ attack on Earth and the ensuing systemwide conflict affected inhabitants of Earth, Mars, and other planets and moons. What do the characters in your adventure have…
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Expanse RPG: Community and news
While not hot off the press there are two important pieces of news for GMs and players of the Expanse RPG that I would like to write some more about. The first concerns the launch of a new edition of the rules. I have mentioned this briefly earlier. It is…
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Cargo inbound, open hangar doors!
Trades of the Expanse: Trader/Smuggler has been out for a little while now. This last installment in the ToTE-series gives us additional rules (that can be used with the rules presented in Sol System), two new specialisations, a collection of Challenge Tests, and four new ships. This sourcebook expands (slightly)…
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It-just-dropped-mini-review: Sol System
More resources and guidelines for making and running adventures in humanity’s cradle. Sol system is out in PDF and a print-version can be pre-ordered, and more exciting Expanse roleplaying game news have been announced! As the book just dropped I’ve only had time to skim through it, but so far,…
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Life In The Black: 2023 One-Page Adventure Jam PDF Collection
Finally, the third one page adventure jam collection is here. The collection includes all 14 adventures from the 2023 one-page adventure jam in a single PDF. The theme of the jam in 2023 was “Life In The Black” and challenged the participants to create adventures about the dangers and risks…
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OPAJ23 Live-play!
On Saturday 16 December, Slowzone-Henry, Mickchandler, and Olai, touched down on 2179AL “Pinball” on a high-risk mission. A Rock and a Hot Place, the winning submission of the 2023 One Page Adventure Jam, was live-streamed in a game run by Meric Moir of Sky Hammer Press. If you want to…
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OPAJ23 Winner Announcement!
A winner has been determined in the Expanse RPG GM Facebook group! The winner of the 2023 One-Page Adventure Jam is the adventure “A Rock and a Hot Place” by Jesse Akins. No spoilers about the story here, but be sure to check it out once the PDF collection arrives!…
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Submissions are in! And the One Page Adventure Jam of 2023 is over
The deadline has passed and I can report a record number of submissions for this year’s jam! 15 submissions in total this year, 11 via Facebook and 4 via e-mail. While the jam is over on the part of the participants and their writing of adventures, there is more to…
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Final week: One Page Adventure Jam 2023
Work, travels, and an anniversary, pulled me away from updating and keeping on top of things, but the community has been hard at work, more submissions have been received and are reportedly in the making! This year’s jam comes with the discount code and giveaways of Trades of the Expanse:…
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One week in: Submitting a one page adventure
I am pleased to report that within the first week of the jam we already have two submissions! That’s a record for early submissions, I believe. Browsing various social media channels, I understand that some clarifications could be beneficial, if not necessary. For instance, questions about challenge tests and consequences.…
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Why: One Page Adventure Jam?
So far, the jams have contributed to the Expanse RPG community 12 free one-page adventures. These can be fitted into and adapted to your own campaigns, used as one-shots on conventions, or used as introductory adventures for new players. The first jam ran in the late summer of 2021, and…
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Life in the black, diverse lethality
This is a post about the ongoing One Page Adventure Jam 2023: Life in the Black. Living in space, whether on a ship or station, comes with a constant risk of death. Traversing the expanse in a tin can may be comparable to 15th century explorers, boarding wooden ships using…
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Announcement: 2023 One Page Adventure Jam “Life in the Black”!
The One Page Adventure Jam of 2023 starts now! This year’s jam is titled “Life in the Black”, because it is all about how belters, eathers, and martians, survive in the black. What they have to do to survive, the opportunities they may find, and who they must deal with,…
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Scouts incoming, get ready for data transfer!
When I checked my e-mail this morning, I found a promotional copy of the Trades of the Expanse: Scouts (release on Green Ronin store and DrivethruRPG today, 31.08.2023). The release is accompanied by a deep dive on today’s ThursdAGE (at 2pm Pacific, 5pm Eastern, and 23:00 CEST). This free promo…
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One Page Adventure Jam 2023
The time is upon us, this year’s jam is just around the corner. This year the discussion around topic or theme takes us back to the roots of the novels. The announcement is imminent, details to follow.
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Stealth ships and other missing deck plans
The number of deck plans available for players and GMs are considerable. The Ships of the Expanse (SoE) sourcebook provides a substantial amount and variation. However, as is inevitable, players and GMs want more. Not only that, we want them in high resolution for use with VTTs, and in print…
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Community creations: immersive navigation and travelling
Fan made creations are an inevitable and essential feature of roleplaying games. Whether it’s fan made adventures, new player or game master resources, play aids and tools, or fan led live-play events and cons. They are what keep games alive after they are out of print, and adds to and…
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Live-play “Those Who Trust”
Last weekend, Sunday 2 April, the winning submission of a run through of the 2022 One-Page Adventure Jam was streamed live in a collaborative event between Green Ronin Publishing, Abraxas’ Precipice, and The Expanse RPG Fan Community. This is a podcast recording (audio only) This is the recording of the…
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OPAJ22 Winner Live-Play
Over the last two years the Facebook Expanse Roleplaying Game community and its sister GM group have run a one-page adventure jam. This site was in part created to facilitate those events as it grows beyond Facebook to include the entire Expanse RPG community. For the 2022 jam we coordinated…
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Churning out the churn
The community has been at it again. Here’s something new to use in your games. The Churn is a great mechanic that appropriately sets the tone for telling Expanse stories together. However, sometimes coming up with events on the fly can be challenging, and while we may plan ahead, sooner…
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What happens on Eros, better stay on Eros
“Eros: the faecal remnant of a once bright centre in the belt. Where Eros used to be a hub of culture, industry, and commerce, it is now a soiled casino rock that anyone with a modicum of common sense avoids, where the law is but a wishful ideal or a…
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The second volume is here
Finally, after much tweaking and unwanted postponements, the collection of One Page Adventures from the 2022 Jam is edited, finalised, and published. The collection is smaller this time around, however, there was some more work on this volume due to the additions of planets and colonies the jam opened for,…
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!…Incoming signal…!
Real-life threw a few curve balls, but finally some respite came my way. Work on the second volume of the one-page adventures collection is moving ahead, and today I uploaded an updated version of volume 1 to the adventures section. The updates are minor, only a few typos were corrected,…
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Deck plans, maps, and other resources
While editing and compiling the second volume of one-page adventures I find myself grateful and encouraged by the enthusiasm of the community to participate in the challenging exercise of producing one-page adventures. The original ideas, the connections to events or places in the book series, and the variety in types…
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ThursdAGE and the Expanse RPG Fan Community
The Expanse RPG fan community got spotlight attention by Green Ronin on 10 November as part of their weekly ThursdAGE stream. I joined Ian Lemke, John Bultena, and Troy Hewitt in a great conversation about the Expanse RPG, one-page adventures, and the jam the Facebook community has organised over the…
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Tactical space combat
I have uploaded tactical space combat maps to the resources section, one for use with VTTs and one for printing and use at the table. They are both in A3 format for simplicity. This also means that is perfectly downscales to A4 if you need or want to have a…
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Labrea update
I have updated the Labrea deck plans. I am now moving on to the Maynard-class modified freighter from the Bounty Hunter supplement. This is a larger ship, so it may take some more time.
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Analogs or aliens
For participants in the one page adventure jam 2022, a central part of the event is to create new alien planets. With this follows the potential for life. What does this life look like? How different or similar to Earth life is it likely to be? The video below is…
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Updated deck plans
The Labrea-class deck plans have been updated with correct ppi, as well as some minor aesthetic improvements. You can find them here.
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Colonies beyond the rings
I just uploaded a home-brewed star system with a planet and two colonies to the Adventures section. Eidolon was discovered around the time of the Illus incident, and presents a similar challenge to players and GMs. However the planet is quite different and boasts more life, if smaller Builder presence.…
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One Page Adventure Jam 2022
The one page adventure jam of 2022 is ongoing. The incentive for organising it this year is two-fold. The primary reason is that last year’s jam was by our* reckoning a success. We had several contributors and it appears that the adventures are being used and that the contribution is…
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Aesthetics and deck plans in the works
Last night I updated the starship collections and fillable PDFs, with some very minor changes in descriptive texts, new cover, and adding the option to click for losses in the starship collections. Today, I’m also uploading the first version of some unofficial deck plans for the Labrea-class shuttle introduced in…
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The Expanse RPG Fan Community 