Credits and thanks

Built on games their makers chose to share.

Every table on Elrune runs on rules that designers and publishers released under open licences. This page names them, thanks them and points you to their own books and sites. Elrune is an independent product; none of them is affiliated with it or endorses it.

BRP

Basic Roleplaying rules under the ORC License

Elrune began with these rules. Percentile skills that grow with use, characteristics rolled on the table and fights where every blow counts: the engine Jason Durall and Steve Perrin set down has decades of play behind it, and Chaosium chose to open it to everyone under the ORC License. Thank you for that generosity; our first and deepest system is built on it.

Rules: Basic Roleplaying: Universal Game Engine
Created by: Jason Durall and Steve Perrin
Publisher: Chaosium Inc.
Licence: ORC License (TX 9-307-067)

Visit Chaosium Inc.Licence page

The full notice

ORC Notice

This product is licensed under the ORC License held in the Library of Congress at TX 9-307-067 and available online at various locations including www.chaosium.com/orclicense, www.azoralaw.com/orclicense, www.gencon.com/orclicense and others. All warranties are disclaimed as set forth therein.

Attribution Notice

This product is based on the following Licensed Material:

“Basic Roleplaying: Universal Game Engine,” copyright © 2024 Chaosium Inc., by Jason Durall and Steve Perrin.

Elrune is an independent product and is not affiliated with or endorsed by Chaosium Inc. Trademarks belong to their owners and are named here only to say where rules come from.

Publisher reserved material

Not licensed by the ORC License and not used by Elrune:

Product Identity elements in Basic Roleplaying include all artwork, illustrations, and graphic design, including runes and geometric symbols that are not part of the Latin alphabet or Hindu-Arabic numeral system, and all trademarks, including Call of Cthulhu, Chaosium, Fantasy World, Future-World, Futureworld, Magic World, Pendragon, RuneQuest, Superworld, and Worlds of Wonder. Basic Roleplaying is the trademark of Chaosium Inc. Chaosium Inc. and the Chaosium logo are registered trademarks of Chaosium Inc.

Named here to give credit. Elrune is not affiliated with or endorsed by Chaosium Inc.

Larkhollow Square, a board from The Clockmaker's Door, on the Elrune 3D table. — Drawn by Elrune: a board from our own adventures, a miniature from the rules, and its dice. More in the showcase.

The Astral Tower, first floor, a board from The Astral Tower. — Drawn by Elrune: a board from our own adventures, a miniature from the rules, and its dice. More in the showcase.

5E2014

5E 2014

5E compatible, System Reference Document 5.1

Releasing the SRD 5.1 under Creative Commons gave everyone who makes games a firm, lasting footing for fifth edition rules. Classes, spells and creatures from it run our 5E (SRD 5.1) tables square by square, with its notice beside them. Thank you to Wizards of the Coast for putting it in the open.

Rules: System Reference Document 5.1 (SRD 5.1)
Created by: Wizards of the Coast LLC
Publisher: Wizards of the Coast LLC
Licence: Creative Commons Attribution 4.0 International (CC BY 4.0)

Read the SRD 5.1 at its official page Licence page

The full notice

This work includes material taken from the System Reference Document 5.1 ("SRD 5.1") by Wizards of the Coast LLC and available at https://dnd.wizards.com/resources/systems-reference-document. The SRD 5.1 is licensed under the Creative Commons Attribution 4.0 International License available at https://creativecommons.org/licenses/by/4.0/legalcode.

Changes: Elrune extracted the SRD 5.1 text into structured data: layout removed, typographic quotes and dashes normalised, stat blocks, spells and tables split into fields, and rules expressed as code. No rule text was added to the SRD material; anything the SRD does not state is marked BLOCKED: SOURCE VERIFICATION instead of being filled in.

The SRD 5.1 material is provided by the licensor as-is and as-available, without warranties; see section 5 of the CC BY 4.0 licence.

Named here to give credit. Elrune is not affiliated with or endorsed by Wizards of the Coast LLC.

Bellwick market square, a board from The Vigil at Harrow Tor, on the Elrune 3D table. — Drawn by Elrune: a board from our own adventures, a miniature from the rules, and its dice. More in the showcase.

The White Grove, a board from The Frostward of Thornmere. — Drawn by Elrune: a board from our own adventures, a miniature from the rules, and its dice. More in the showcase.

5E2024

5E 2024

5E compatible, System Reference Document 5.2.1

The newer reference rules, weapon masteries and all, came out under the same open licence as the first. We keep them as a separate game here, with their own notice, so a table can choose the edition it loves. Thank you for opening the second one too.

Rules: System Reference Document 5.2.1 (SRD 5.2.1)
Created by: Wizards of the Coast LLC
Publisher: Wizards of the Coast LLC
Licence: Creative Commons Attribution 4.0 International (CC BY 4.0)

Read the SRD 5.2.1 at its official page Licence page

The full notice

This work includes material from the System Reference Document 5.2.1 ("SRD 5.2.1") by Wizards of the Coast LLC, available at https://www.dndbeyond.com/srd. The SRD 5.2.1 is licensed under the Creative Commons Attribution 4.0 International License, available at https://creativecommons.org/licenses/by/4.0/legalcode.

Changes: Elrune extracted the SRD 5.2.1 text into structured data: layout removed, typographic quotes and dashes normalised, stat blocks, spells, classes and tables split into fields, and rules expressed as code. No rule text was added to the SRD material; anything the SRD does not state is marked BLOCKED: SOURCE VERIFICATION instead of being filled in.

The SRD 5.2.1 material is provided by the licensor as-is and as-available, without warranties; see section 5 of the CC BY 4.0 licence.

Compatible with fifth edition (5E compatible). SRD 5.1 and SRD 5.2.1 are separate systems here, each with its own notice.

Named here to give credit. Elrune is not affiliated with or endorsed by Wizards of the Coast LLC.

Brackenford green and the mill, a board from The Weir at Brackenford, on the Elrune 3D table. — Drawn by Elrune: a board from our own adventures, a miniature from the rules, and its dice. More in the showcase.

The hospice of Saint Wendrell, a board from The Hospice on Greywhistle Pass. — Drawn by Elrune: a board from our own adventures, a miniature from the rules, and its dice. More in the showcase.

Aspects and Fate Points

Based on Fate Core System

Aspects, fate points and a ladder of skills: a game that puts the story first and trusts the table. Evil Hat shared the whole system under Creative Commons so that others could build on it, and the people named here developed, wrote and edited it. Our Aspects and Fate Points tables are based on their work. Thank you.

Rules: Fate Core System and Fate Accelerated Edition
Created by: Leonard Balsera, Brian Engard, Jeremy Keller, Ryan Macklin, Mike Olson, Clark Valentine, Amanda Valentine, Fred Hicks, and Rob Donoghue
Publisher: Evil Hat Productions, LLC
Licence: Creative Commons Attribution 3.0 Unported (CC BY 3.0)

Visit the Fate site Licence page

The full notice

This work is based on Fate Core System and Fate Accelerated Edition (found at http://www.faterpg.com/), products of Evil Hat Productions, LLC, developed, authored, and edited by Leonard Balsera, Brian Engard, Jeremy Keller, Ryan Macklin, Mike Olson, Clark Valentine, Amanda Valentine, Fred Hicks, and Rob Donoghue, and licensed for our use under the Creative Commons Attribution 3.0 Unported license (http://creativecommons.org/licenses/by/3.0/).

Rules based on Fate Core System (Evil Hat Productions, LLC), CC BY 3.0.

Changes: Converted to structured data and rules code by Elrune; rules text otherwise unchanged except whitespace.

Fate™ is a trademark of Evil Hat Productions, LLC. Elrune is not affiliated with or endorsed by Evil Hat Productions, LLC.

Named here to give credit. Elrune is not affiliated with or endorsed by Evil Hat Productions, LLC.

The Ossery Crater, a board from The Glass Comet, on the Elrune 3D table. — Drawn by Elrune: a board from our own adventures, a miniature from the rules, and its dice. More in the showcase.

The Hare Stones, a board from The Tithe of Hollin Isle. — Drawn by Elrune: a board from our own adventures, a miniature from the rules, and its dice. More in the showcase.

Forged in the Dark

Forged in the Dark rules

Position and effect, clocks, flashbacks and stress: John Harper designed a way to play daring crews that a whole family of Forged in the Dark games has grown from, and One Seven Design shares its reference rules under Creative Commons. Our crews run their scores on them. Thank you.

Rules: The Forged in the Dark SRD
Created by: John Harper
Publisher: One Seven Design
Licence: Creative Commons Attribution 3.0 Unported (CC BY 3.0)

Visit One Seven Design’s site Licence page

The full notice

This work is based on Blades in the Dark (found at http://www.bladesinthedark.com/), product of One Seven Design, developed and authored by John Harper, and licensed for our use under the Creative Commons Attribution 3.0 Unported license (http://creativecommons.org/licenses/by/3.0/).

Changes: the core rules were converted to structured data and rules code by Elrune; record text had Markdown emphasis removed and whitespace normalised, wording unchanged. The Duskwall setting and everything outside the SRD are not used.

Elrune is not affiliated with or endorsed by One Seven Design.

Named here to give credit. Elrune is not affiliated with or endorsed by One Seven Design.

The glasshouse, a board from The Glasshouse Job, on the Elrune 3D table. — Drawn by Elrune: a board from our own adventures, and its dice. More in the showcase.

The Patience, a board from The Hulk at Low Water. — Drawn by Elrune: a board from our own adventures, and its dice. More in the showcase.

Into the Wood

Based on Cairn Second Edition by Yochai Gal

Lean rules, no classes, and a wood where every step is a choice. Yochai Gal wrote Cairn Second Edition and shares all of its text openly, so that anyone may adapt it. Into the Wood is our adaptation, and it stays under the same licence for anyone to share in turn. Thank you.

Rules: Cairn Second Edition
Created by: Yochai Gal
Publisher: Yochai Gal
Licence: Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)

Read Cairn Second Edition at its official site Licence page

The full notice

This material is based on Cairn Second Edition by Yochai Gal (https://cairnrpg.com), licensed under CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). Elrune converted it to structured data and edited it for the table.

Source: Cairn Second Edition by Yochai Gal, https://cairnrpg.com (text from https://github.com/yochaigal/cairn at commit f320cf6).

Changes: Converted from the Markdown source to structured JSON by Elrune: Markdown emphasis and links removed, whitespace normalised, tables split into fields; wording otherwise unchanged.

Offered as-is: the licensor makes no representations or warranties (CC BY-SA 4.0, Section 5).

Share-alike: the rules text and content from Cairn Second Edition, and adaptations of them made here (by Elrune or by adventure creators), are licensed under CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). Nothing in this site’s terms restricts what that licence allows. “Into the Wood” is Elrune’s name for this ruleset; it is not endorsed by the author.

Named here to give credit. Elrune is not affiliated with or endorsed by Yochai Gal.

Ambry House, a board from The Orchard of Hollow Bells, on the Elrune 3D table. — Drawn by Elrune: a board from our own adventures, a miniature from the rules, and its dice. More in the showcase.

Old Mill Road and Deadmill, a board from Trouble in Twin Lakes. — Drawn by Elrune: a board from our own adventures, a miniature from the rules, and its dice. More in the showcase.

The adventure writers

Adventures we adapted, and the people who wrote them

These adventures were released openly by their authors. We converted them to the game they run in here, drew their boards and set them up for the table. The stories are theirs; thank you for sharing them.

Doomed Zone

Released to the public domain (CC0). No credit is required; we give it gladly.

The Astral TowerGame system: BRP
Based on The Astral Tower by Doomed Zone (CC0). Converted to BRP and adapted for Elrune.
Original adventure: Doomed Zone (CC0). Conversion, boards and adaptation: Elrune.
The original by Doomed Zone
The Lost Tomb of Queen RhawenGame system: BRP
Based on The Lost Tomb of Queen Rhawen by Doomed Zone (CC0). Converted to BRP and adapted for Elrune.
Original adventure: Doomed Zone (CC0). Conversion, boards and adaptation: Elrune.
The original by Doomed Zone
The Terror of DunmoorGame system: BRP
Based on The Terror of Dunmoor by Doomed Zone (CC0). Converted to BRP and adapted for Elrune. Town layouts informed by maps made with Watabou’s Village Generator.
Original adventure: Doomed Zone (CC0). Town layouts: Watabou’s Village Generator. Conversion, maps and adaptation: Elrune.
The original by Doomed Zone
The Old BloodGame system: BRP
Based on The Old Blood by Doomed Zone (CC0). Converted to BRP and adapted for Elrune.
Original adventure: Doomed Zone (CC0). City layout after Watabou’s Medieval Fantasy City Generator. Conversion, boards and adaptation: Elrune.
The original by Doomed Zone
Beneath StillrootGame system: BRP
Based on Doomed to Die #1: Beneath Stillroot by Doomed Zone (CC0). Converted to BRP and adapted for Elrune.
Original adventure: Doomed Zone (CC0). Conversion, boards and adaptation: Elrune.
The original by Doomed Zone
The Corpseless CoffinGame system: BRP
Based on The Corpseless Coffin by Doomed Zone (CC0). Converted to BRP and adapted for Elrune.
Original adventure: Doomed Zone (CC0). Conversion, boards and adaptation: Elrune.
The original by Doomed Zone
The Mist Beyond ManertonGame system: BRP
Based on The Mist Beyond Manerton by Doomed Zone (CC0). Converted to BRP and adapted for Elrune.
Original adventure: Doomed Zone (CC0). Conversion, boards and adaptation: Elrune.
The original by Doomed Zone

Yochai Gal

Licensed CC BY-SA 4.0, so our adaptations are too: anyone may download their adapted text and share it under the same licence.

Trouble in Twin LakesGame system: Into the Wood
This adventure is adapted from CAS-1: Trouble in Twin Lakes by Yochai Gal, licensed CC BY-SA 4.0 (https://cairnrpg.com/adventures/first-party/cas-1/). Changes: converted for Elrune. This adaptation is licensed CC BY-SA 4.0.
Written by Yochai Gal, with editing by Derek B. and editing assistance by Yossi Krausz, layout and locale maps by Adam Hensley. Cover art and region map by Ari-Matti Toivonen. Produced by Cairn Press. Converted for Elrune.
The original by Yochai Gal Download the adapted text (CC BY-SA 4.0)
Rise of the Blood OlmsGame system: Into the Wood
This adventure is adapted from CAS-2: Rise of the Blood Olms by Yochai Gal, licensed CC BY-SA 4.0 (https://cairnrpg.com/adventures/first-party/cas-2/). Changes: converted for Elrune. This adaptation is licensed CC BY-SA 4.0.
Words by Yochai Gal, Editing by Derek B., Cover & Map art by Ari-Matti Toivonen, Layout & Rusal Art by Adam Hensley. Published May 2026. Converted for Elrune.
The original by Yochai Gal Download the adapted text (CC BY-SA 4.0)
The Feast of Tegny WoodGame system: Into the Wood
This adventure is adapted from CAS-3: The Feast of Tegny Wood by Yochai Gal, licensed CC BY-SA 4.0 (https://cairnrpg.com/adventures/first-party/cas-3/). Changes: converted for Elrune. This adaptation is licensed CC BY-SA 4.0.
Written by Yochai Gal, Editing by Derek B. and Yossi Krausz, Layout by Adam Hensley, Art & Map by Ari-Matti Toivonen. Published May 2026. Converted for Elrune.
The original by Yochai Gal Download the adapted text (CC BY-SA 4.0)

Where else the credits appear

Each system’s short credit line also sits beside its material: on its sheets and tables, in the rules library, on its adventures’ pages and in the showcase. Adventures that creators publish on Elrune carry the notice of the rules they are built on.

The complete legal text, what Elrune reserves and what stays open is on Licences and notices. Something wrong or missing here? Tell us and we will put it right.