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A game creation toolkit

A setting-neutral tabletop RPG system that emphasizes the power of deals made between players and Storyteller.

Expand your Cairn (or other OSR) experience with diegetic character choices and meaningful decisions!

Genre Neutral Rules Lite TTRPG

A Fast & Flexible Toolbox RPG

Draw, describe, decide - action!

A modern classic fantasy TTRPG using two six-sided dice

A simple, hackable, one die RPG system.

The open-source basic rules of the 4C System / Four Color System

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

The 0D0P tables let you use any writing to roll a D2-D20.

Licence for Cage of Sand inspired games

Nano (12-word) TTRPG featuring multiple challenge difficulty classes, and player character proficiencies.

A ruleset for fantasy roleplaying.

A simple ruleset for gritty medieval games.

Create your own content based on Firelights

A Creative Commons rules system for TTRPGs

Minimalist tabletop RPG

Evolution in game design

How to design for Descended from the Queen games

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

A gm-less roleplaying SRD

A guide to making solo tarot RPGs

A toolkit for creating card-based solo journaling games.

Free, open license fantasy SRD for TTRPGs

Ultralight Old School RPG Rules

A modular tabletop RPG system designed to be easy to learn and modify.