core
itdr
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
core
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Playtesting Problem: Players are happy
Copyright is brain damage. The book's source files are fully open, and everyone is welcome to copy everything.
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S6 RPG System (Open Source / Creative Commons)
Or for a pure TeX compile, there's mine.
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Lend me your intuitions: Is this ugly?
That's good phrasing, and pretty much where the current draft is at.
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ChronichlesRPG: A Public Domain Tabletop RPG System
For my own rpg, I went with LaTeX. It's less inviting, but you get more control over the output pdf.
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Typst, an alternative to LaTeX, is now open source
It was once in Scribus, but nothing else can do what LaTeX does. I've just pushed to the master branch.
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BIND: The Hackable Dark Fantasy
The source files will always be open (including layout, images, et c.), so you can change rules you don't like, add spells, and everyone else can take a copy of your changes if they like them. Source files available here.
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A hackable RPG for RPG hackers
Download this, put in your name, character name, add points until the XP total reaches 0 (it tracks what you spend), then add items from the drop-down menus.
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On the topic of licensing, why not use the GNU Free Documentation License?
This is why.
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Recommendations on RPGs that aren't under WotC OGL?
There is such a thing as CC0 artwork so I'm not sure where the difficulty is. There are even open source TTRPGs with artwork in them such as BIND. There are even CC0 licensed video games with the artwork also licensed as CC0, one even was announced today!
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Open Source Like
Source
itdr
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LaTeX for publishing tabletop role-playing games
> Creating a theme for tabletop role-playing games would take some elbow grease
The article links to several, including a convincing reproduction of basic Wizards of the Coast house style for D&D 5E:
https://github.com/rpgtex/DND-5e-LaTeX-Template
Here's another 5E one with additional sidebar styles:
https://github.com/anoderay/DND-5e-LaTeX-Template/
Also 5E-inspired, with a template for card accessories:
https://github.com/Krozark/RPG-LaTeX-Template
A 5E-compatible character sheet:
https://github.com/matsavage/DND-5e-LaTeX-Character-Sheet-Te...
CTAN also has packages for Basic D&D-inspired typesetting (rpg-module, also linked from the article), GURPS (gurps), generic hex boards (hexboard), and wargame hex boards with counters (wargame).
There are also indie TTRPGs that've shipped using custom LaTeX templates; this one has CC-BY licensed source: https://github.com/ludus-leonis/nipajin
And the blog author's own, with a more restrictive CC-NC-SA license: https://github.com/Vladar4/itdr
From personal experience, the biggest struggle is non-rectangular text wrapping around images.
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Into the Dungeon: Revived [v2.2 release]
Of course, see charsheets.zip at itch.io, or release page.
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LaTEX template for an RPG book
Into The Dungeon: Revived is written in latex, and is CC-BY-SA. Additionally, the Cairn Bestiary is written using a tex template.
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Open Source Like
That's certainly an option. Games like Liminal Horror and Into the Dungeon Revived host versions on GitHub. You can then render it to a GitHub.io page using something like Just the Docs.
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Cairn PC advancement?
There are Scars in Cairn (just like in Electric Bastionland) but for advancement specifically it would be simple to use Into The Odd or Into The Dungeon: Revived advancement rules!
What are some alternatives?
oneshot
DND-5e-LaTeX-Template - A Small Template For 5e D&D Material
awesome-tabletop-rpgs - Awesome list of free and/or open source tabletop RPGs
homebrewery - Create authentic looking D&D homebrews using only markdown
EXP_Documents - Sciency fiction table top RPG documentation. Asciidoc to HTML site generation using Antoradocs.
LiminalHorror
typst.nvim - WIP. Goals: Treesitter highlighting, snippets, and a smooth intergration with neovim.
star-wars-latex - Latex version of Star Wars documents
isometric-map-icons
DND-5e-LaTeX-Character-Template - LaTeX package to typeset character sheets for the fifth edition of the "world's greatest roleplaying game".
typst - A new markup-based typesetting system that is powerful and easy to learn.