RPGnet - User contributions [en]

Open Game Systems

2008-09-04T11:37:06Z

Khuxan: /* The List: */ Action! System and Active Exploits

[[Category:OpenLicense]]

Roughly once a month, there's a thread on RPGnet asking about what systems are available under an open license like the OGL or the Creative Commons licenses. This project aims to collect all those games, ordered by license, on one page, to help aspiring game designers and publishers find an open system for their games.

= Definition: What is an Open License? =

There is no simple or comprehensive definition of an "open license". The [http://www.opensource.org/docs/osd Open Source Definition], used by the Open Source Initiative, isn't useful in the context of RPG game rules. This page operates under the following definition:

"An Open License allows the free and perpetual re-use of original material by anybody willing to follow the restrictions of said license, without an explicit contact or negotiation between original author and licensee."

In other words, if something is available under an open license, I can use and re-use it for free, as long as I respect the restrictions laid out in the license, without having to ask or contact the author.

Good examples of Open Licenses used for RPG systems are the [[Open Game License]], the original [http://en.wikipedia.org/wiki/Fudge_%28role-playing_game_system%29 Fudge License] and various [http://en.wikipedia.org/wiki/Creative_Commons_licenses Creative Commons Licenses].

Many of those licenses are not compatible with each other, so people wishing to use material covered under multiple licenses should keep this in mind. (And probably consult a lawyer. Or at least the licenses FAQ.)

'' Secondary Licenses ''

Many games, particularly those published under the Open Game License, also include a secondary license which allows the publication of compatable material using the trademarks of the game. These licenses restrict the publisher further than the OGL does, and sometimes include requirements that do not qualify as an open license. For example, [[Mutants & Masterminds]] is released under the OGL, and also under M&M Superlink. Superlink is not an open license - it requires potential publishers to contact publisher Green Ronin for their project to be approved. Mutants & Masterminds is still listed on this page because its content is under the OGL, though its trademarks are not.

= The List: =

The following systems are available under an open license and are thus free to use in your own publications. (Though with varying restriction on the use of the material.)

'''[[Open Game License]] ([http://www.wizards.com/d20/files/OGLv1.0a.rtf Direct Link])'''
* [http://www.basicfantasy.org/downloads.html BFRPG], Basic Fantasy Role-Playing Game.
* [http://www.wizards.com/default.asp?x=d20/article/msrd Modern d20 SRD]
* [http://www.faterpg.com/dl/animed20srd.pdf d20 Anime SRD] (direct link to file)
* [http://www.faterpg.com/dl/Fate-SRD-2005-03-31.rtf Fate 2.0] (direct link to the file)
* [http://www.faterpg.com/dl/sotc-srd.html Spirit of the Century]
* [http://www.action-system.com/ Action! System]
* [http://www.darkshire.net/jhkim/rpg/srd/srd_runic/index.html Runic], Runequest RPG
* [http://rpg.drivethrustuff.com/product_info.php?products_id=29076 Iridium System]

'''Open Game License and Another License'''

These games release their material as Open Game Content, but also provide another, more restricted, license to allow publishers to refer to Product Identity.
* [http://www.wizards.com/default.asp?x=d20/article/srd35 d20 System 3.5 SRD], Dungeons and Dragons (OGL and d20 System License)
* [http://www.knights-n-knaves.com/osric OSRIC] (OGL and OSRIC Open License)
* [http://www.goblinoidgames.com/labyrinthlord.htm Labyrinth Lord] (OGL and [http://www.goblinoidgames.com/ll_license1.zip Labyrinth Lord Trademark License])
* [http://www.goblinoidgames.com/mutantfuture.htm Mutant Future] (OGL and Mutant Future Trademark License)
* [http://www.goblinoidgames.com/gore.htm GORE] (OGL and GORE License)
* [http://yeoldegamingcompanye.com/wayfarersmain.htm Wayfarers] (OGL and open-ended agreement)
* [http://www.prometheusgaming.com/ Prometheus SRD] (OGL and Prometheus License)
* [http://www.fudgerpg.com/fudge.html FUDGE] (OGL and FUDGE System Trademark License; also under its own license)
* [http://www.keepandshare.com/doc/show.php?i=335944&cat=3&fclick=y Swords & Wizardry] (OGL and the Swords & Wizardry Compatability Statement License)
* [http://www.mutantsandmasterminds.com/ Mutants & Masterminds] (OGL and [http://www.mutantsandmasterminds.com/superlink/000080.php M&M Superlink])
* [http://true20.com/ True20] (OGL and [http://true20.com/licensing/True20TrademarkLicense.htm True20 Adventure Roleplaying Trademark License])

'''Creative Commons Licenses'''
* [http://www.bullypulpitgames.com/games/index.php?game=drowning_and_falling Drowning and Falling] (Attribution/Non-Commercial/Share-Alike)
* [http://tsoy.crngames.com/ The Shadow of Yesterday] (Attribution)
* [http://open.crngames.com/src/donjon.html Donjon] (Attribution/Share-Alike)
* [http://bayn.org/wushu/wushu-open.html Wushu Open] (Attribution)
* [http://wiki.saberpunk.net/Wushu/OpenReloaded Wushu Open Reloaded] (Attribution/Share-Alike)
* [http://www.harlekin-maus.com/games/shadows/shadows.html Shadows] (Attribution)
* [http://www.sanestudios.co.uk Myriad] (Attribution)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)
* [http://rpg.starwreck.com Star Wreck] (Attribution/Non-Commercial/Share-Alike)
* [http://www.allenvarney.com/noteworthy.html Noteworthy] (Attribution/Non-Commercial)
* [http://gregstolze.com/ExecutiveDecision.zip Executive Decision] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://gregstolze.com/inSpaaace.zip ...in Spaaace!] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)

'''GNU free documentation license'''
* [http://www.godsmonsters.com/ Gods and Monsters]
* [http://worldforge.org/dev/content/rules/circe/ Circe] (also GNU General Public License)

'''Other'''
* [http://hazardstudio.net/sitebuildercontent/sitebuilderfiles/4csystem.zip 4C System] (Public Domain; Direct link to file)
* [http://www.dominionrules.org/ Dominion Rules] (Dominion Rules Licence)
* [http://rpg.drivethrustuff.com/product_info.php?products_id=28830 Action! System] (Action! System Open License)
* [http://rpg.drivethrustuff.com/product_info.php?products_id=2589 Active Exploits] (Active Exploits Distribution and Expansion License)

Open Game Systems

2008-09-04T11:23:49Z

Khuxan: /* The List: */ Iridium System

Open Game Systems

2008-09-04T09:19:59Z

Khuxan: /* The List: */

[[Category:OpenLicense]]

Roughly once a month, there's a thread on RPGnet asking about what systems are available under an open license like the OGL or the Creative Commons licenses. This project aims to collect all those games, ordered by license, on one page, to help aspiring game designers and publishers find an open system for their games.

= Definition: What is an Open License? =

There is no simple or comprehensive definition of an "open license". The [http://www.opensource.org/docs/osd Open Source Definition], used by the Open Source Initiative, isn't useful in the context of RPG game rules. This page operates under the following definition:

"An Open License allows the free and perpetual re-use of original material by anybody willing to follow the restrictions of said license, without an explicit contact or negotiation between original author and licensee."

In other words, if something is available under an open license, I can use and re-use it for free, as long as I respect the restrictions laid out in the license, without having to ask or contact the author.

Good examples of Open Licenses used for RPG systems are the [[Open Game License]], the original [http://en.wikipedia.org/wiki/Fudge_%28role-playing_game_system%29 Fudge License] and various [http://en.wikipedia.org/wiki/Creative_Commons_licenses Creative Commons Licenses].

Many of those licenses are not compatible with each other, so people wishing to use material covered under multiple licenses should keep this in mind. (And probably consult a lawyer. Or at least the licenses FAQ.)

'' Secondary Licenses ''

Many games, particularly those published under the Open Game License, also include a secondary license which allows the publication of compatable material using the trademarks of the game. These licenses restrict the publisher further than the OGL does, and sometimes include requirements that do not qualify as an open license. For example, [[Mutants & Masterminds]] is released under the OGL, and also under M&M Superlink. Superlink is not an open license - it requires potential publishers to contact publisher Green Ronin for their project to be approved. Mutants & Masterminds is still listed on this page because its content is under the OGL, though its trademarks are not.

= The List: =

The following systems are available under an open license and are thus free to use in your own publications. (Though with varying restriction on the use of the material.)

'''[[Open Game License]] ([http://www.wizards.com/d20/files/OGLv1.0a.rtf Direct Link])'''
* [http://www.basicfantasy.org/downloads.html BFRPG], Basic Fantasy Role-Playing Game.
* [http://www.wizards.com/default.asp?x=d20/article/msrd Modern d20 SRD]
* [http://www.faterpg.com/dl/animed20srd.pdf d20 Anime SRD] (direct link to file)
* [http://www.faterpg.com/dl/Fate-SRD-2005-03-31.rtf Fate 2.0] (direct link to the file)
* [http://www.faterpg.com/dl/sotc-srd.html Spirit of the Century]
* [http://www.action-system.com/ Action! System]
* [http://www.darkshire.net/jhkim/rpg/srd/srd_runic/index.html Runic], Runequest RPG

'''Open Game License and Another License'''

These games release their material as Open Game Content, but also provide another, more restricted, license to allow publishers to refer to Product Identity.
* [http://www.wizards.com/default.asp?x=d20/article/srd35 d20 System 3.5 SRD], Dungeons and Dragons (OGL and d20 System License)
* [http://www.knights-n-knaves.com/osric OSRIC] (OGL and OSRIC Open License)
* [http://www.goblinoidgames.com/labyrinthlord.htm Labyrinth Lord] (OGL and [http://www.goblinoidgames.com/ll_license1.zip Labyrinth Lord Trademark License])
* [http://www.goblinoidgames.com/mutantfuture.htm Mutant Future] (OGL and Mutant Future Trademark License)
* [http://www.goblinoidgames.com/gore.htm GORE] (OGL and GORE License)
* [http://yeoldegamingcompanye.com/wayfarersmain.htm Wayfarers] (OGL and open-ended agreement)
* [http://www.prometheusgaming.com/ Prometheus SRD] (OGL and Prometheus License)
* [http://www.fudgerpg.com/fudge.html FUDGE] (OGL and FUDGE System Trademark License; also under its own license)
* [http://www.keepandshare.com/doc/show.php?i=335944&cat=3&fclick=y Swords & Wizardry] (OGL and the Swords & Wizardry Compatability Statement License)
* [http://www.mutantsandmasterminds.com/ Mutants & Masterminds] (OGL and [http://www.mutantsandmasterminds.com/superlink/000080.php M&M Superlink])
* [http://true20.com/ True20] (OGL and [http://true20.com/licensing/True20TrademarkLicense.htm True20 Adventure Roleplaying Trademark License])

'''Creative Commons Licenses'''
* [http://www.bullypulpitgames.com/games/index.php?game=drowning_and_falling Drowning and Falling] (Attribution/Non-Commercial/Share-Alike)
* [http://tsoy.crngames.com/ The Shadow of Yesterday] (Attribution)
* [http://open.crngames.com/src/donjon.html Donjon] (Attribution/Share-Alike)
* [http://bayn.org/wushu/wushu-open.html Wushu Open] (Attribution)
* [http://wiki.saberpunk.net/Wushu/OpenReloaded Wushu Open Reloaded] (Attribution/Share-Alike)
* [http://www.harlekin-maus.com/games/shadows/shadows.html Shadows] (Attribution)
* [http://www.sanestudios.co.uk Myriad] (Attribution)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)
* [http://rpg.starwreck.com Star Wreck] (Attribution/Non-Commercial/Share-Alike)
* [http://www.allenvarney.com/noteworthy.html Noteworthy] (Attribution/Non-Commercial)
* [http://gregstolze.com/ExecutiveDecision.zip Executive Decision] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://gregstolze.com/inSpaaace.zip ...in Spaaace!] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)

'''GNU free documentation license'''
* [http://www.godsmonsters.com/ Gods and Monsters]
* [http://worldforge.org/dev/content/rules/circe/ Circe] (also GNU General Public License)

'''Other'''
* [http://hazardstudio.net/sitebuildercontent/sitebuilderfiles/4csystem.zip 4C System] (Public Domain; Direct link to file)
* [http://www.dominionrules.org/ Dominion Rules] (Dominion Rules Licence)

Open Game Systems

2008-09-04T09:03:59Z

Khuxan: /* Definition: What is an Open License? */

[[Category:OpenLicense]]

Roughly once a month, there's a thread on RPGnet asking about what systems are available under an open license like the OGL or the Creative Commons licenses. This project aims to collect all those games, ordered by license, on one page, to help aspiring game designers and publishers find an open system for their games.

= Definition: What is an Open License? =

There is no simple or comprehensive definition of an "open license". The [http://www.opensource.org/docs/osd Open Source Definition], used by the Open Source Initiative, isn't useful in the context of RPG game rules. This page operates under the following definition:

"An Open License allows the free and perpetual re-use of original material by anybody willing to follow the restrictions of said license, without an explicit contact or negotiation between original author and licensee."

In other words, if something is available under an open license, I can use and re-use it for free, as long as I respect the restrictions laid out in the license, without having to ask or contact the author.

Good examples of Open Licenses used for RPG systems are the [[Open Game License]], the original [http://en.wikipedia.org/wiki/Fudge_%28role-playing_game_system%29 Fudge License] and various [http://en.wikipedia.org/wiki/Creative_Commons_licenses Creative Commons Licenses].

Many of those licenses are not compatible with each other, so people wishing to use material covered under multiple licenses should keep this in mind. (And probably consult a lawyer. Or at least the licenses FAQ.)

'' Secondary Licenses ''

Many games, particularly those published under the Open Game License, also include a secondary license which allows the publication of compatable material using the trademarks of the game. These licenses restrict the publisher further than the OGL does, and sometimes include requirements that do not qualify as an open license. For example, [[Mutants & Masterminds]] is released under the OGL, and also under M&M Superlink. Superlink is not an open license - it requires potential publishers to contact publisher Green Ronin for their project to be approved. Mutants & Masterminds is still listed on this page because its content is under the OGL, though its trademarks are not.

= The List: =

The following systems are available under an open license and are thus free to use in your own publications. (Though with varying restriction on the use of the material.)

'''[[Open Game License]] ([http://www.wizards.com/d20/files/OGLv1.0a.rtf Direct Link])'''
* [http://www.basicfantasy.org/downloads.html BFRPG], Basic Fantasy Role-Playing Game.
* [http://www.wizards.com/default.asp?x=d20/article/msrd Modern d20 SRD]
* [http://www.faterpg.com/dl/animed20srd.pdf d20 Anime SRD] (direct link to file)
* [http://www.faterpg.com/dl/Fate-SRD-2005-03-31.rtf Fate 2.0] (direct link to the file)
* [http://www.faterpg.com/dl/sotc-srd.html Spirit of the Century]
* [http://www.action-system.com/ Action! System]
* [http://www.darkshire.net/jhkim/rpg/srd/srd_runic/index.html Runic] (Used in the Runequest RPG)

'''Open Game License and Another License'''

These games release their material as Open Game Content, but also provide another, more restricted, license to allow publishers to refer to Product Identity.
* [http://www.wizards.com/default.asp?x=d20/article/srd35 d20 System 3.5 SRD], Dungeons and Dragons (OGL and d20 System License)
* [http://www.knights-n-knaves.com/osric OSRIC] (OGL and OSRIC Open License)
* [http://www.goblinoidgames.com/labyrinthlord.htm Labyrinth Lord] (OGL and [http://www.goblinoidgames.com/ll_license1.zip Labyrinth Lord Trademark License])
* [http://www.goblinoidgames.com/mutantfuture.htm Mutant Future] (OGL and Mutant Future Trademark License)
* [http://www.goblinoidgames.com/gore.htm GORE] (OGL and GORE License)
* [http://yeoldegamingcompanye.com/wayfarersmain.htm Wayfarers] (OGL and open-ended agreement)
* [http://www.prometheusgaming.com/ Prometheus SRD] (OGL and Prometheus License)
* [http://www.fudgerpg.com/fudge.html FUDGE] (OGL and FUDGE System Trademark License; also under its own license)
* [http://www.keepandshare.com/doc/show.php?i=335944&cat=3&fclick=y Swords & Wizardry] (OGL and the Swords & Wizardry Compatability Statement License)
* [http://www.mutantsandmasterminds.com/ Mutants & Masterminds] (OGL and [http://www.mutantsandmasterminds.com/superlink/000080.php M&M Superlink])
* [http://true20.com/ True20](OGL and [http://true20.com/licensing/True20TrademarkLicense.htm True20 Adventure Roleplaying Trademark License])

'''Creative Commons Licenses'''
* [http://www.bullypulpitgames.com/games/index.php?game=drowning_and_falling Drowning and Falling] (Attribution/Non-Commercial/Share-Alike)
* [http://tsoy.crngames.com/ The Shadow of Yesterday] (Attribution)
* [http://open.crngames.com/src/donjon.html Donjon] (Attribution/Share-Alike)
* [http://bayn.org/wushu/wushu-open.html Wushu Open] (Attribution)
* [http://wiki.saberpunk.net/Wushu/OpenReloaded Wushu Open Reloaded] (Attribution/Share-Alike)
* [http://www.harlekin-maus.com/games/shadows/shadows.html Shadows] (Attribution)
* [http://www.sanestudios.co.uk Myriad] (Attribution)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)
* [http://rpg.starwreck.com Star Wreck] (Attribution/Non-Commercial/Share-Alike)
* [http://www.allenvarney.com/noteworthy.html Noteworthy] (Attribution/Non-Commercial)
* [http://gregstolze.com/ExecutiveDecision.zip Executive Decision] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://gregstolze.com/inSpaaace.zip ...in Spaaace!] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)

'''GNU free documentation license'''
* [http://www.godsmonsters.com/ Gods and Monsters]
* [http://worldforge.org/dev/content/rules/circe/ Circe] (also GNU General Public License)

'''Other'''
* [http://hazardstudio.net/sitebuildercontent/sitebuilderfiles/4csystem.zip 4C System] (Public Domain; Direct link to file)
* [http://www.dominionrules.org/ Dominion Rules] (Dominion Rules Licence)

Open Game Systems

2008-09-03T06:51:49Z

Khuxan: /* Definition: What is an Open License? */

[[Category:OpenLicense]]

Roughly once a month, there's a thread on RPGnet asking about what systems are available under an open license like the OGL or the Creative Commons licenses. This project aims to collect all those games, ordered by license, on one page, to help aspiring game designers and publishers find an open system for their games.

= Definition: What is an Open License? =

There is no simple or comprehensive definition of an "open license". The [http://www.opensource.org/docs/osd Open Source Definition], used by the Open Source Initiative, isn't useful in the context of RPG game rules. This page operates under the following definition:

"An Open License allows the free and perpetual re-use of original material by anybody willing to follow the restrictions of said license, without an explicit contact or negotiation between original author and licensee."

In other words, if something is available under an open license, I can use and re-use it for free, as long as I respect the restrictions laid out in the license, without having to ask or contact the author.

Good examples of Open Licenses used for RPG systems are the [[Open Game License]], the original [http://en.wikipedia.org/wiki/Fudge_%28role-playing_game_system%29 Fudge License] and various [http://en.wikipedia.org/wiki/Creative_Commons_licenses Creative Commons Licenses].

Many of those licenses are not compatible with each other, so people wishing to use material covered under multiple licenses should keep this in mind. (And probably consult a lawyer. Or at least the licenses FAQ.)

'' Secondary Licenses ''

Many games, particularly those published under the Open Game License, also include a secondary license which allows the publication of compatable material using the trademarks of the game. These licenses restrict the publisher further than the OGL does, and sometimes include requirements that do not qualify as an open license. For example, [Mutants & Masterminds] is released under the OGL, and also under M&M Superlink. Superlink is not an open license - it requires potential publishers to contact publisher Green Ronin for their project to be approved. Mutants & Masterminds is still listed on this page because its content is under the OGL, though its trademarks are not.

= The List: =

The following systems are available under an open license and are thus free to use in your own publications. (Though with varying restriction on the use of the material.)

'''[[Open Game License]] ([http://www.wizards.com/d20/files/OGLv1.0a.rtf Direct Link])'''
* [http://www.basicfantasy.org/downloads.html BFRPG], Basic Fantasy Role-Playing Game.
* [http://www.wizards.com/default.asp?x=d20/article/msrd Modern d20 SRD]
* [http://www.faterpg.com/dl/animed20srd.pdf d20 Anime SRD] (direct link to file)
* [http://www.faterpg.com/dl/Fate-SRD-2005-03-31.rtf Fate 2.0] (direct link to the file)
* [http://www.faterpg.com/dl/sotc-srd.html Spirit of the Century]
* [http://www.action-system.com/ Action! System]
* [http://www.darkshire.net/jhkim/rpg/srd/srd_runic/index.html Runic] (Used in the Runequest RPG)

'''Open Game License and Another License'''

These games release their material as Open Game Content, but also provide another, more restricted, license to allow publishers to refer to Product Identity.
* [http://www.wizards.com/default.asp?x=d20/article/srd35 d20 System 3.5 SRD], Dungeons and Dragons (OGL and d20 System License)
* [http://www.knights-n-knaves.com/osric OSRIC] (OGL and OSRIC Open License)
* [http://www.goblinoidgames.com/labyrinthlord.htm Labyrinth Lord] (OGL and [http://www.goblinoidgames.com/ll_license1.zip Labyrinth Lord Trademark License])
* [http://www.goblinoidgames.com/mutantfuture.htm Mutant Future] (OGL and Mutant Future Trademark License)
* [http://www.goblinoidgames.com/gore.htm GORE] (OGL and GORE License)
* [http://yeoldegamingcompanye.com/wayfarersmain.htm Wayfarers] (OGL and open-ended agreement)
* [http://www.prometheusgaming.com/ Prometheus SRD] (OGL and Prometheus License)
* [http://www.fudgerpg.com/fudge.html FUDGE] (OGL and FUDGE System Trademark License; also under its own license)
* [http://www.keepandshare.com/doc/show.php?i=335944&cat=3&fclick=y Swords & Wizardry] (OGL and the Swords & Wizardry Compatability Statement License)
* [http://www.mutantsandmasterminds.com/ Mutants & Masterminds] (OGL and [http://www.mutantsandmasterminds.com/superlink/000080.php M&M Superlink])
* [http://true20.com/ True20](OGL and [http://true20.com/licensing/True20TrademarkLicense.htm True20 Adventure Roleplaying Trademark License])

'''Creative Commons Licenses'''
* [http://www.bullypulpitgames.com/games/index.php?game=drowning_and_falling Drowning and Falling] (Attribution/Non-Commercial/Share-Alike)
* [http://tsoy.crngames.com/ The Shadow of Yesterday] (Attribution)
* [http://open.crngames.com/src/donjon.html Donjon] (Attribution/Share-Alike)
* [http://bayn.org/wushu/wushu-open.html Wushu Open] (Attribution)
* [http://wiki.saberpunk.net/Wushu/OpenReloaded Wushu Open Reloaded] (Attribution/Share-Alike)
* [http://www.harlekin-maus.com/games/shadows/shadows.html Shadows] (Attribution)
* [http://www.sanestudios.co.uk Myriad] (Attribution)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)
* [http://rpg.starwreck.com Star Wreck] (Attribution/Non-Commercial/Share-Alike)
* [http://www.allenvarney.com/noteworthy.html Noteworthy] (Attribution/Non-Commercial)
* [http://gregstolze.com/ExecutiveDecision.zip Executive Decision] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://gregstolze.com/inSpaaace.zip ...in Spaaace!] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)

'''GNU free documentation license'''
* [http://www.godsmonsters.com/ Gods and Monsters]
* [http://worldforge.org/dev/content/rules/circe/ Circe] (also GNU General Public License)

'''Other'''
* [http://hazardstudio.net/sitebuildercontent/sitebuilderfiles/4csystem.zip 4C System] (Public Domain; Direct link to file)
* [http://www.dominionrules.org/ Dominion Rules] (Dominion Rules Licence)

Open Game Systems

2008-09-03T05:12:53Z

Khuxan: /* Definition: What is an Open License? */ Cleared up language and added "Secondary Licenses"

[[Category:OpenLicense]]

Roughly once a month, there's a thread on RPGnet asking about what systems are available under an open license like the OGL or the Creative Commons licenses. This project aims to collect all those games, ordered by license, on one page, to help aspiring game designers and publishers find an open system for their games.

= Definition: What is an Open License? =

There is no simple or comprehensive definition of an "open license". The [http://www.opensource.org/docs/osd Open Source Definition], used by the Open Source Initiative, isn't useful in the context of RPG game rules. This page operates under the following definition:

"An Open License allows the free and perpetual re-use of original material by anybody willing to follow the restrictions of said license, without an explicit contact or negotiation between original author and licensee."

In other words, if something is available under an open license, I can use and re-use it for free, as long as I respect the restrictions laid out in the license, without having to ask or contact the author.

Good examples of Open Licenses used for RPG systems are the [[Open Game License]], the original [http://en.wikipedia.org/wiki/Fudge_%28role-playing_game_system%29 Fudge License] and various [http://en.wikipedia.org/wiki/Creative_Commons_licenses Creative Commons Licenses].

Many of those licenses are not compatible with each other, so people wishing to use material covered under multiple licenses should keep this in mind. (And probably consult a lawyer. Or at least the licenses FAQ.)

'' Secondary Licenses ''
Many games, particularly those published under the Open Game License, also include a secondary license which allows the publication of compatable material using the trademarks of the game. These licenses restrict the publisher further than the OGL does, and sometimes include requirements that do not qualify as an open license. For example, [Mutants & Masterminds] is released under the OGL, and also under M&M Superlink. Superlink is not an open license - it requires potential publishers to contact publisher Green Ronin for their project to be approved. Mutants & Masterminds is still listed on this page because its content is under the OGL, though its trademarks are not.

= The List: =

The following systems are available under an open license and are thus free to use in your own publications. (Though with varying restriction on the use of the material.)

'''[[Open Game License]] ([http://www.wizards.com/d20/files/OGLv1.0a.rtf Direct Link])'''
* [http://www.basicfantasy.org/downloads.html BFRPG], Basic Fantasy Role-Playing Game.
* [http://www.wizards.com/default.asp?x=d20/article/msrd Modern d20 SRD]
* [http://www.faterpg.com/dl/animed20srd.pdf d20 Anime SRD] (direct link to file)
* [http://www.faterpg.com/dl/Fate-SRD-2005-03-31.rtf Fate 2.0] (direct link to the file)
* [http://www.faterpg.com/dl/sotc-srd.html Spirit of the Century]
* [http://www.action-system.com/ Action! System]
* [http://www.darkshire.net/jhkim/rpg/srd/srd_runic/index.html Runic] (Used in the Runequest RPG)

'''Open Game License and Another License'''

These games release their material as Open Game Content, but also provide another, more restricted, license to allow publishers to refer to Product Identity.
* [http://www.wizards.com/default.asp?x=d20/article/srd35 d20 System 3.5 SRD], Dungeons and Dragons (OGL and d20 System License)
* [http://www.knights-n-knaves.com/osric OSRIC] (OGL and OSRIC Open License)
* [http://www.goblinoidgames.com/labyrinthlord.htm Labyrinth Lord] (OGL and [http://www.goblinoidgames.com/ll_license1.zip Labyrinth Lord Trademark License])
* [http://www.goblinoidgames.com/mutantfuture.htm Mutant Future] (OGL and Mutant Future Trademark License)
* [http://www.goblinoidgames.com/gore.htm GORE] (OGL and GORE License)
* [http://yeoldegamingcompanye.com/wayfarersmain.htm Wayfarers] (OGL and open-ended agreement)
* [http://www.prometheusgaming.com/ Prometheus SRD] (OGL and Prometheus License)
* [http://www.fudgerpg.com/fudge.html FUDGE] (OGL and FUDGE System Trademark License; also under its own license)
* [http://www.keepandshare.com/doc/show.php?i=335944&cat=3&fclick=y Swords & Wizardry] (OGL and the Swords & Wizardry Compatability Statement License)
* [http://www.mutantsandmasterminds.com/ Mutants & Masterminds] (OGL and [http://www.mutantsandmasterminds.com/superlink/000080.php M&M Superlink])
* [http://true20.com/ True20](OGL and [http://true20.com/licensing/True20TrademarkLicense.htm True20 Adventure Roleplaying Trademark License])

'''Creative Commons Licenses'''
* [http://www.bullypulpitgames.com/games/index.php?game=drowning_and_falling Drowning and Falling] (Attribution/Non-Commercial/Share-Alike)
* [http://tsoy.crngames.com/ The Shadow of Yesterday] (Attribution)
* [http://open.crngames.com/src/donjon.html Donjon] (Attribution/Share-Alike)
* [http://bayn.org/wushu/wushu-open.html Wushu Open] (Attribution)
* [http://wiki.saberpunk.net/Wushu/OpenReloaded Wushu Open Reloaded] (Attribution/Share-Alike)
* [http://www.harlekin-maus.com/games/shadows/shadows.html Shadows] (Attribution)
* [http://www.sanestudios.co.uk Myriad] (Attribution)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)
* [http://rpg.starwreck.com Star Wreck] (Attribution/Non-Commercial/Share-Alike)
* [http://www.allenvarney.com/noteworthy.html Noteworthy] (Attribution/Non-Commercial)
* [http://gregstolze.com/ExecutiveDecision.zip Executive Decision] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://gregstolze.com/inSpaaace.zip ...in Spaaace!] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)

'''GNU free documentation license'''
* [http://www.godsmonsters.com/ Gods and Monsters]
* [http://worldforge.org/dev/content/rules/circe/ Circe] (also GNU General Public License)

'''Other'''
* [http://hazardstudio.net/sitebuildercontent/sitebuilderfiles/4csystem.zip 4C System] (Public Domain; Direct link to file)
* [http://www.dominionrules.org/ Dominion Rules] (Dominion Rules Licence)

Open Game Systems

2008-09-03T05:05:21Z

Khuxan: /* The List: */ True20 and Mutants and Masterminds

[[Category:OpenLicense]]

Roughly once a month, there's a thread on RPGnet asking about what systems are available under an open license like the OGL or the Creative Commons licenses. This project aims to collect all those games, ordered by license, on one page, to help aspiring game designers and publishers find an open system for their games.

= Definition: What is an Open License? =

So far I haven't found a simple and comprehensive definition of what exactly constitutes an "open license" in the general sense. The [http://www.opensource.org/docs/osd Open Source Definition], used by the Open Source Initiative, isn't really usefull in the context of RPG game rules, so here is my ad-hoc and a bit vague definition:

"An Open License allows the free and perpetual re-use of original material by anybody willing to follow the restrictions of said license, without an explicit contact or negotiatian between original author and licensee."

In other words, if something is available under an open license, I can use and re-use it for free, as long as I respect the restrictions laid out in the license, without having to ask or contact the author. (If somebody has a better definition, I'm all for it.)

Good examples of Open Licenses used for RPG systems are the [[Open Game License]], the original [http://en.wikipedia.org/wiki/Fudge_%28role-playing_game_system%29 Fudge License] and various [http://en.wikipedia.org/wiki/Creative_Commons_licenses Creative Commons Licenses].

Many of those licenses are not compatible with each other, so people wishing to use material covered under multiple licenses should keep this in mind. (And probably consult a lawyer. Or at least the licenses FAQ.)

= The List: =

The following systems are available under an open license and are thus free to use in your own publications. (Though with varying restriction on the use of the material.)

'''[[Open Game License]] ([http://www.wizards.com/d20/files/OGLv1.0a.rtf Direct Link])'''
* [http://www.basicfantasy.org/downloads.html BFRPG], Basic Fantasy Role-Playing Game.
* [http://www.wizards.com/default.asp?x=d20/article/msrd Modern d20 SRD]
* [http://www.faterpg.com/dl/animed20srd.pdf d20 Anime SRD] (direct link to file)
* [http://www.faterpg.com/dl/Fate-SRD-2005-03-31.rtf Fate 2.0] (direct link to the file)
* [http://www.faterpg.com/dl/sotc-srd.html Spirit of the Century]
* [http://www.action-system.com/ Action! System]
* [http://www.darkshire.net/jhkim/rpg/srd/srd_runic/index.html Runic] (Used in the Runequest RPG)

'''Open Game License and Another License'''

These games release their material as Open Game Content, but also provide another, more restricted, license to allow publishers to refer to Product Identity.
* [http://www.wizards.com/default.asp?x=d20/article/srd35 d20 System 3.5 SRD], Dungeons and Dragons (OGL and d20 System License)
* [http://www.knights-n-knaves.com/osric OSRIC] (OGL and OSRIC Open License)
* [http://www.goblinoidgames.com/labyrinthlord.htm Labyrinth Lord] (OGL and [http://www.goblinoidgames.com/ll_license1.zip Labyrinth Lord Trademark License])
* [http://www.goblinoidgames.com/mutantfuture.htm Mutant Future] (OGL and Mutant Future Trademark License)
* [http://www.goblinoidgames.com/gore.htm GORE] (OGL and GORE License)
* [http://yeoldegamingcompanye.com/wayfarersmain.htm Wayfarers] (OGL and open-ended agreement)
* [http://www.prometheusgaming.com/ Prometheus SRD] (OGL and Prometheus License)
* [http://www.fudgerpg.com/fudge.html FUDGE] (OGL and FUDGE System Trademark License; also under its own license)
* [http://www.keepandshare.com/doc/show.php?i=335944&cat=3&fclick=y Swords & Wizardry] (OGL and the Swords & Wizardry Compatability Statement License)
* [http://www.mutantsandmasterminds.com/ Mutants & Masterminds] (OGL and [http://www.mutantsandmasterminds.com/superlink/000080.php M&M Superlink])
* [http://true20.com/ True20](OGL and [http://true20.com/licensing/True20TrademarkLicense.htm True20 Adventure Roleplaying Trademark License])

'''Creative Commons Licenses'''
* [http://www.bullypulpitgames.com/games/index.php?game=drowning_and_falling Drowning and Falling] (Attribution/Non-Commercial/Share-Alike)
* [http://tsoy.crngames.com/ The Shadow of Yesterday] (Attribution)
* [http://open.crngames.com/src/donjon.html Donjon] (Attribution/Share-Alike)
* [http://bayn.org/wushu/wushu-open.html Wushu Open] (Attribution)
* [http://wiki.saberpunk.net/Wushu/OpenReloaded Wushu Open Reloaded] (Attribution/Share-Alike)
* [http://www.harlekin-maus.com/games/shadows/shadows.html Shadows] (Attribution)
* [http://www.sanestudios.co.uk Myriad] (Attribution)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)
* [http://rpg.starwreck.com Star Wreck] (Attribution/Non-Commercial/Share-Alike)
* [http://www.allenvarney.com/noteworthy.html Noteworthy] (Attribution/Non-Commercial)
* [http://gregstolze.com/ExecutiveDecision.zip Executive Decision] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://gregstolze.com/inSpaaace.zip ...in Spaaace!] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)

'''GNU free documentation license'''
* [http://www.godsmonsters.com/ Gods and Monsters]
* [http://worldforge.org/dev/content/rules/circe/ Circe] (also GNU General Public License)

'''Other'''
* [http://hazardstudio.net/sitebuildercontent/sitebuilderfiles/4csystem.zip 4C System] (Public Domain; Direct link to file)
* [http://www.dominionrules.org/ Dominion Rules] (Dominion Rules Licence)

Open Game Systems

2008-09-01T23:33:24Z

Khuxan: /* The List: */ Swords and Wizardry added

[[Category:OpenLicense]]

Roughly once a month, there's a thread on RPGnet asking about what systems are available under an open license like the OGL or the Creative Commons licenses. This project aims to collect all those games, ordered by license, on one page, to help aspiring game designers and publishers find an open system for their games.

= Definition: What is an Open License? =

So far I haven't found a simple and comprehensive definition of what exactly constitutes an "open license" in the general sense. The [http://www.opensource.org/docs/osd Open Source Definition], used by the Open Source Initiative, isn't really usefull in the context of RPG game rules, so here is my ad-hoc and a bit vague definition:

"An Open License allows the free and perpetual re-use of original material by anybody willing to follow the restrictions of said license, without an explicit contact or negotiatian between original author and licensee."

In other words, if something is available under an open license, I can use and re-use it for free, as long as I respect the restrictions laid out in the license, without having to ask or contact the author. (If somebody has a better definition, I'm all for it.)

Good examples of Open Licenses used for RPG systems are the [[Open Game License]], the original [http://en.wikipedia.org/wiki/Fudge_%28role-playing_game_system%29 Fudge License] and various [http://en.wikipedia.org/wiki/Creative_Commons_licenses Creative Commons Licenses].

Many of those licenses are not compatible with each other, so people wishing to use material covered under multiple licenses should keep this in mind. (And probably consult a lawyer. Or at least the licenses FAQ.)

= The List: =

The following systems are available under an open license and are thus free to use in your own publications. (Though with varying restriction on the use of the material.)

'''[[Open Game License]] ([http://www.wizards.com/d20/files/OGLv1.0a.rtf Direct Link])'''
* [http://www.basicfantasy.org/downloads.html BFRPG], Basic Fantasy Role-Playing Game.
* [http://www.wizards.com/default.asp?x=d20/article/msrd Modern d20 SRD]
* [http://www.faterpg.com/dl/animed20srd.pdf d20 Anime SRD] (direct link to file)
* [http://www.faterpg.com/dl/Fate-SRD-2005-03-31.rtf Fate 2.0] (direct link to the file)
* [http://www.faterpg.com/dl/sotc-srd.html Spirit of the Century]
* [http://www.action-system.com/ Action! System]
* [http://www.darkshire.net/jhkim/rpg/srd/srd_runic/index.html Runic] (Used in the Runequest RPG)

'''Open Game License and Another License'''

These games release their material as Open Game Content, but also provide another, more restricted, license to allow publishers to refer to Product Identity.
* [http://www.wizards.com/default.asp?x=d20/article/srd35 d20 System 3.5 SRD], Dungeons and Dragons (OGL and d20 System License)
* [http://www.knights-n-knaves.com/osric OSRIC] (OGL and OSRIC Open License)
* [http://www.goblinoidgames.com/labyrinthlord.htm Labyrinth Lord] (OGL and [http://www.goblinoidgames.com/ll_license1.zip Labyrinth Lord Trademark License])
* [http://www.goblinoidgames.com/mutantfuture.htm Mutant Future] (OGL and Mutant Future Trademark License)
* [http://www.goblinoidgames.com/gore.htm GORE] (OGL and GORE License)
* [http://yeoldegamingcompanye.com/wayfarersmain.htm Wayfarers] (OGL and open-ended agreement)
* [http://www.prometheusgaming.com/ Prometheus SRD] (OGL and Prometheus License)
* [http://www.fudgerpg.com/fudge.html FUDGE] (OGL and FUDGE System Trademark License; also under its own license)
* [http://www.keepandshare.com/doc/show.php?i=335944&cat=3&fclick=y Swords & Wizardry] (OGL and the Swords & Wizardry Compatability Statement License)

'''Creative Commons Licenses'''
* [http://www.bullypulpitgames.com/games/index.php?game=drowning_and_falling Drowning and Falling] (Attribution/Non-Commercial/Share-Alike)
* [http://tsoy.crngames.com/ The Shadow of Yesterday] (Attribution)
* [http://open.crngames.com/src/donjon.html Donjon] (Attribution/Share-Alike)
* [http://bayn.org/wushu/wushu-open.html Wushu Open] (Attribution)
* [http://wiki.saberpunk.net/Wushu/OpenReloaded Wushu Open Reloaded] (Attribution/Share-Alike)
* [http://www.harlekin-maus.com/games/shadows/shadows.html Shadows] (Attribution)
* [http://www.sanestudios.co.uk Myriad] (Attribution)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)
* [http://rpg.starwreck.com Star Wreck] (Attribution/Non-Commercial/Share-Alike)
* [http://www.allenvarney.com/noteworthy.html Noteworthy] (Attribution/Non-Commercial)
* [http://gregstolze.com/ExecutiveDecision.zip Executive Decision] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://gregstolze.com/inSpaaace.zip ...in Spaaace!] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)

'''GNU free documentation license'''
* [http://www.godsmonsters.com/ Gods and Monsters]
* [http://worldforge.org/dev/content/rules/circe/ Circe] (also GNU General Public License)

'''Other'''
* [http://hazardstudio.net/sitebuildercontent/sitebuilderfiles/4csystem.zip 4C System] (Public Domain; Direct link to file)
* [http://www.dominionrules.org/ Dominion Rules] (Dominion Rules Licence)

Open Game License

2008-08-28T10:55:20Z

Khuxan: GSL

[[Category:OGL]]
[[Category:OpenLicenses]]

==Open Game License==

The Open Game License is an open license created by Wizards of the Coast to support its d20 line of role-playing games, in particular the third edition of Dungeons and Dragons. A license for a document is generally considered "open" if it allows for the redistribution and modification of the document without further permission from the original creator. This is a concept that was first introduced for the source code for software, and the GNU license is, perhaps, the most well-known example.

In addition to the OGL, Wizards of the Coast created a more restrictive d20 license. The d20 license is more restrictive than the OGL and requires explicit approval from Wizards of the Coast before publication of a product using that license.

The original justification for the open game license was to promote a more unified role-playing-game community and market. It is widely believed that it was extremely successful in this regard. It is also believed that this led to much of the continued success of Dungeons and Dragons 3.0 and 3.5.

Wizards of the Coast has released the fourth edition of Dungeons and Dragons under the [[Game System License]], a license significantly different to the OGL.

==Versions of the OGL==
One of the unusual strengths of the OGL is clause 9, which allows for any version of the license to be used for any document released under any version of the license. Thus, if a document is released under version 1.0b, anyone may choose to use the document as if it were released under version 1.0a.

Versions of the OGL:
# [[Open_Game_License_%28v1.0a%29]]

==References==
* ''Just What Is the Open Gaming License?'', retrieved 24 May 2008 [http://www.wizards.com/dnd/article.asp?x=dnd/br/br20010720a]

Open Game Systems

2008-08-28T09:50:05Z

Khuxan: /* The List: */

[[Category:OpenLicense]]

Roughly once a month, there's a thread on RPGnet asking about what systems are available under an open license like the OGL or the Creative Commons licenses. This project aims to collect all those games, ordered by license, on one page, to help aspiring game designers and publishers find an open system for their games.

= Definition: What is an Open License? =

So far I haven't found a simple and comprehensive definition of what exactly constitutes an "open license" in the general sense. The [http://www.opensource.org/docs/osd Open Source Definition], used by the Open Source Initiative, isn't really usefull in the context of RPG game rules, so here is my ad-hoc and a bit vague definition:

"An Open License allows the free and perpetual re-use of original material by anybody willing to follow the restrictions of said license, without an explicit contact or negotiatian between original author and licensee."

In other words, if something is available under an open license, I can use and re-use it for free, as long as I respect the restrictions laid out in the license, without having to ask or contact the author. (If somebody has a better definition, I'm all for it.)

Good examples of Open Licenses used for RPG systems are the [[Open Game License]], the original [http://en.wikipedia.org/wiki/Fudge_%28role-playing_game_system%29 Fudge License] and various [http://en.wikipedia.org/wiki/Creative_Commons_licenses Creative Commons Licenses].

Many of those licenses are not compatible with each other, so people wishing to use material covered under multiple licenses should keep this in mind. (And probably consult a lawyer. Or at least the licenses FAQ.)

= The List: =

The following systems are available under an open license and are thus free to use in your own publications. (Though with varying restriction on the use of the material.)

'''[[Open Game License]] ([http://www.wizards.com/d20/files/OGLv1.0a.rtf Direct Link])'''
* [http://www.basicfantasy.org/downloads.html BFRPG], Basic Fantasy Role-Playing Game.
* [http://www.wizards.com/default.asp?x=d20/article/msrd Modern d20 SRD]
* [http://www.faterpg.com/dl/animed20srd.pdf d20 Anime SRD] (direct link to file)
* [http://www.faterpg.com/dl/Fate-SRD-2005-03-31.rtf Fate 2.0] (direct link to the file)
* [http://www.faterpg.com/dl/sotc-srd.html Spirit of the Century]
* [http://www.action-system.com/ Action! System]
* [http://www.darkshire.net/jhkim/rpg/srd/srd_runic/index.html Runic] (Used in the Runequest RPG)

'''Open Game License and Another License'''

These games release their material as Open Game Content, but also provide another, more restricted, license to allow publishers to refer to Product Identity.
* [http://www.wizards.com/default.asp?x=d20/article/srd35 d20 System 3.5 SRD], Dungeons and Dragons (OGL and d20 System License)
* [http://www.knights-n-knaves.com/osric OSRIC] (OGL and OSRIC Open License)
* [http://www.goblinoidgames.com/labyrinthlord.htm Labyrinth Lord] (OGL and [http://www.goblinoidgames.com/ll_license1.zip Labyrinth Lord Trademark License])
* [http://www.goblinoidgames.com/mutantfuture.htm Mutant Future] (OGL and Mutant Future Trademark License)
* [http://www.goblinoidgames.com/gore.htm GORE] (OGL and GORE License)
* [http://yeoldegamingcompanye.com/wayfarersmain.htm Wayfarers] (OGL and open-ended agreement)
* [http://www.prometheusgaming.com/ Prometheus SRD] (OGL and Prometheus License)
* [http://www.fudgerpg.com/fudge.html FUDGE] (OGL and FUDGE System Trademark License; also under its own license)

'''Creative Commons Licenses'''
* [http://www.bullypulpitgames.com/games/index.php?game=drowning_and_falling Drowning and Falling] (Attribution/Non-Commercial/Share-Alike)
* [http://tsoy.crngames.com/ The Shadow of Yesterday] (Attribution)
* [http://open.crngames.com/src/donjon.html Donjon] (Attribution/Share-Alike)
* [http://bayn.org/wushu/wushu-open.html Wushu Open] (Attribution)
* [http://wiki.saberpunk.net/Wushu/OpenReloaded Wushu Open Reloaded] (Attribution/Share-Alike)
* [http://www.harlekin-maus.com/games/shadows/shadows.html Shadows] (Attribution)
* [http://www.sanestudios.co.uk Myriad] (Attribution)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)
* [http://rpg.starwreck.com Star Wreck] (Attribution/Non-Commercial/Share-Alike)
* [http://www.allenvarney.com/noteworthy.html Noteworthy] (Attribution/Non-Commercial)
* [http://gregstolze.com/ExecutiveDecision.zip Executive Decision] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://gregstolze.com/inSpaaace.zip ...in Spaaace!] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)

'''GNU free documentation license'''
* [http://www.godsmonsters.com/ Gods and Monsters]
* [http://worldforge.org/dev/content/rules/circe/ Circe] (also GNU General Public License)

'''Other'''
* [http://hazardstudio.net/sitebuildercontent/sitebuilderfiles/4csystem.zip 4C System] (Public Domain; Direct link to file)
* [http://www.dominionrules.org/ Dominion Rules] (Dominion Rules Licence)

Open Game Systems

2008-08-28T09:36:44Z

Khuxan: /* The List: */ Some formatting changes and extra details

[[Category:OpenLicense]]

Roughly once a month, there's a thread on RPGnet asking about what systems are available under an open license like the OGL or the Creative Commons licenses. This project aims to collect all those games, ordered by license, on one page, to help aspiring game designers and publishers find an open system for their games.

= Definition: What is an Open License? =

So far I haven't found a simple and comprehensive definition of what exactly constitutes an "open license" in the general sense. The [http://www.opensource.org/docs/osd Open Source Definition], used by the Open Source Initiative, isn't really usefull in the context of RPG game rules, so here is my ad-hoc and a bit vague definition:

"An Open License allows the free and perpetual re-use of original material by anybody willing to follow the restrictions of said license, without an explicit contact or negotiatian between original author and licensee."

In other words, if something is available under an open license, I can use and re-use it for free, as long as I respect the restrictions laid out in the license, without having to ask or contact the author. (If somebody has a better definition, I'm all for it.)

Good examples of Open Licenses used for RPG systems are the [[Open Game License]], the original [http://en.wikipedia.org/wiki/Fudge_%28role-playing_game_system%29 Fudge License] and various [http://en.wikipedia.org/wiki/Creative_Commons_licenses Creative Commons Licenses].

Many of those licenses are not compatible with each other, so people wishing to use material covered under multiple licenses should keep this in mind. (And probably consult a lawyer. Or at least the licenses FAQ.)

= The List: =

The following systems are available under an open license and are thus free to use in your own publications. (Though with varying restriction on the use of the material.)

'''[[Open Game License]] ([http://www.wizards.com/d20/files/OGLv1.0a.rtf Direct Link])'''
* [http://www.basicfantasy.org/downloads.html BFRPG], Basic Fantasy Role-Playing Game.
* [http://www.wizards.com/default.asp?x=d20/article/msrd Modern d20 SRD]
* [http://www.faterpg.com/dl/animed20srd.pdf d20 Anime SRD] (direct link to file)
* [http://www.faterpg.com/dl/Fate-SRD-2005-03-31.rtf Fate 2.0] (direct link to the file)
* [http://www.faterpg.com/dl/sotc-srd.html Spirit of the Century]
* [http://www.action-system.com/ Action! System]
* [http://www.darkshire.net/jhkim/rpg/srd/srd_runic/index.html Runic] (Used in the Runequest RPG)

'''[[Open Game License and Another License]]'''
These games release their material as Open Game Content, but also provide another, more restricted, license to allow publishers to refer to Product Identity.
* [http://www.wizards.com/default.asp?x=d20/article/srd35 d20 System 3.5 SRD], Dungeons and Dragons (OGL and d20 System License)
* [http://www.knights-n-knaves.com/osric OSRIC] (OGL and OSRIC Open License)
* [http://www.goblinoidgames.com/labyrinthlord.htm Labyrinth Lord] (OGL and [http://www.goblinoidgames.com/ll_license1.zip Labyrinth Lord Trademark License])
* [http://www.goblinoidgames.com/mutantfuture.htm Mutant Future] (OGL and Mutant Future Trademark License)
* [http://www.goblinoidgames.com/gore.htm GORE] (OGL and GORE License)
* [http://yeoldegamingcompanye.com/wayfarersmain.htm Wayfarers] (OGL and open-ended agreement)
* [http://www.prometheusgaming.com/ Prometheus SRD] (OGL and Prometheus License)
* [http://www.fudgerpg.com/fudge.html FUDGE] (OGL and FUDGE System Trademark License; also under its own license)

'''Creative Commons Licenses'''
* [http://www.bullypulpitgames.com/games/index.php?game=drowning_and_falling Drowning and Falling] (Attribution/Non-Commercial/Share-Alike)
* [http://tsoy.crngames.com/ The Shadow of Yesterday] (Attribution)
* [http://open.crngames.com/src/donjon.html Donjon] (Attribution/Share-Alike)
* [http://bayn.org/wushu/wushu-open.html Wushu Open] (Attribution)
* [http://wiki.saberpunk.net/Wushu/OpenReloaded Wushu Open Reloaded] (Attribution/Share-Alike)
* [http://www.harlekin-maus.com/games/shadows/shadows.html Shadows] (Attribution)
* [http://www.sanestudios.co.uk Myriad] (Attribution)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)
* [http://rpg.starwreck.com Star Wreck] (Attribution/Non-Commercial/Share-Alike)
* [http://www.allenvarney.com/noteworthy.html Noteworthy] (Attribution/Non-Commercial)
* [http://gregstolze.com/ExecutiveDecision.zip Executive Decision] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://gregstolze.com/inSpaaace.zip ...in Spaaace!] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)

'''GNU free documentation license'''
* [http://www.godsmonsters.com/ Gods and Monsters]
* [http://worldforge.org/dev/content/rules/circe/ Circe] (also GNU General Public License)

'''Other'''
* [http://hazardstudio.net/sitebuildercontent/sitebuilderfiles/4csystem.zip 4C System] (Public Domain; Direct link to file)
* [http://www.dominionrules.org/ Dominion Rules] (Dominion Rules Licence)

Open Game Systems

2008-08-26T08:33:26Z

Khuxan: /* The List: */ Wayfarers added

[[Category:OpenLicense]]

Roughly once a month, there's a thread on RPGnet asking about what systems are available under an open license like the OGL or the Creative Commons licenses. This project aims to collect all those games, ordered by license, on one page, to help aspiring game designers and publishers find an open system for their games.

= Definition: What is an Open License? =

So far I haven't found a simple and comprehensive definition of what exactly constitutes an "open license" in the general sense. The [http://www.opensource.org/docs/osd Open Source Definition], used by the Open Source Initiative, isn't really usefull in the context of RPG game rules, so here is my ad-hoc and a bit vague definition:

"An Open License allows the free and perpetual re-use of original material by anybody willing to follow the restrictions of said license, without an explicit contact or negotiatian between original author and licensee."

In other words, if something is available under an open license, I can use and re-use it for free, as long as I respect the restrictions laid out in the license, without having to ask or contact the author. (If somebody has a better definition, I'm all for it.)

Good examples of Open Licenses used for RPG systems are the [[Open Game License]], the original [http://en.wikipedia.org/wiki/Fudge_%28role-playing_game_system%29 Fudge License] and various [http://en.wikipedia.org/wiki/Creative_Commons_licenses Creative Commons Licenses].

Many of those licenses are not compatible with each other, so people wishing to use material covered under multiple licenses should keep this in mind. (And probably consult a lawyer. Or at least the licenses FAQ.)

= The List: =

The following systems are available under an open license and are thus free to use in your own publications. (Though with varying restriction on the use of the material.)

'''[[Open Game License]]'''
* [http://www.basicfantasy.org/downloads.html BFRPG], basic fantasy role-playing game (basic retro-clone).
* [http://www.wizards.com/dnd/ Dungeons & Dragons (d20 System version)]
:: [http://www.wizards.com/default.asp?x=d20/article/srd35 d20 System 3.5 SRD]
:: (note that usage of the d20 System name and logo requires observing further restrictions)
* [http://www.wizards.com/default.asp?x=d20/article/msrd Modern d20 SRD]
* [http://www.faterpg.com/dl/animed20srd.pdf d20 Anime SRD] (direct link to file)
* [http://www.faterpg.com/ Fate] (derived from the Fudge OGL)
:: [http://www.faterpg.com/dl/Fate-SRD-2005-03-31.rtf Fate 2.0 SRD]
:: [http://www.faterpg.com/dl/sotc-srd.html Spirit of the Century SRD]
* [http://yeoldegamingcompanye.com/wayfarersmain.htm Wayfarers]
* [http://www.action-system.com/ Action! System]
* [http://www.fudgerpg.com/fudge.html FUDGE] (also available under its own license)
* [http://www.goblinoidgames.com/labyrinthlord.htm Labyrinth Lord] (basic retro-clone)
* [http://www.goblinoidgames.com/mutantfuture.htm Mutant Future] (Labyrinth Lord adaptation)
* [http://www.goblinoidgames.com/gore.htm GORE] (Generic Old School Role-Playing Engine, percentage-based)
* [http://www.darkshire.net/jhkim/rpg/srd/srd_runic/index.html Runic] (Used in the Runequest RPG)
* [http://www.prometheusgaming.com/ Prometheus SRD] (standard SRD plus character creation and advancement)

'''Creative Commons Licenses'''
* [http://www.bullypulpitgames.com/games/index.php?game=drowning_and_falling Drowning and Falling] (Attribution/Non-Commercial/Share-Alike)
* [http://tsoy.crngames.com/ The Shadow of Yesterday] (Attribution)
* [http://open.crngames.com/src/donjon.html Donjon] (Attribution/Share-Alike)
* [http://bayn.org/wushu/wushu-open.html Wushu Open] (Attribution)
* [http://wiki.saberpunk.net/Wushu/OpenReloaded Wushu Open Reloaded] (Attribution/Share-Alike)
* [http://www.harlekin-maus.com/games/shadows/shadows.html Shadows] (Attribution)
* [http://www.sanestudios.co.uk Myriad] (Attribution)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)
* [http://rpg.starwreck.com Star Wreck] (Attribution/Non-Commercial/Share-Alike)
* [http://www.allenvarney.com/noteworthy.html Noteworthy] (Attribution/Non-Commercial)
* [http://gregstolze.com/ExecutiveDecision.zip Executive Decision] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://gregstolze.com/inSpaaace.zip ...in Spaaace!] (Attribution/Non-Commercial/Share-Alike; direct link to file)
* [http://www.costik.com/weblog/2005_08_01_blogchive.html#112454587656432430 Violence] (Attribution/Non-Commercial/Share-Alike)

'''GNU free documentation license'''
* [http://www.godsmonsters.com/ Gods and Monsters]

'''Other'''
* [http://worldforge.org/dev/content/rules/circe/ Circe] (Free Documentation License)
* [http://www.knights-n-knaves.com/osric OSRIC] (its own variation on OGL, 1e retro-clone)
* [http://hazardstudio.net/sitebuildercontent/sitebuilderfiles/4csystem.zip 4C System] (Public Domain; Direct link to file)
* [http://www.dominionrules.org/ Dominion Rules] (Dominion Rules Licence)