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A System Reference Document dedicated for hackers and game designers, in order to create game by Following the LEADS.

Create your own map crawl!

How to design for Descended from the Queen games

Make your own game ignited by Hopes & Dreams.

The CopperHead System Essential Toolbox is a free ttrpg game engine with the addition of optional variants,

A 3d6 TTRPG system that includes templates and logo.

An Introduction to the Hero System

An asset to make your own hacks / Un recurso para hacer tus propios hacks

This is a set of mechanics for playing or creating a d20+d6 role-playing game without corporate attachments.

A Dice-based system for picking Major Arcana cards, which you can put into your games.

Evolution in game design

Build and explore communities and their places

An Introductory TTRPG Design SRD

The Free, Open and Generic Role-Playing Game to Power Your Storytelling

Guide for making games with trick taking combat, based on Transgender Deathmatch Legend.

Iron Core is a rich dice mechanic for you to build your own games.

Tokens instead of Dice, Poker Dice for Conflicts

Third Party License Design Kit & SRD for Down We Go

Vis-a-Vis is a fast, modular, and competitive RPG system focused on player vs. player interaction.

A story-first, push-your-luck system for your games

An SRD to make action packed RPGs with forward momentum.

Create games, supplements or content for Storyteller, the Campfire Narrative Game

Create detailed branched random event generators and games that use a single roll.

A conversational method for resolving conflict in TTRPGs

A System Reference Document for Lay On Hands

extravagantly chivalrous

System Reference Document for the Four Points RPG System

Little systems for TTRPG designers