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A letter-writing game SRD

An easy, adaptable card-based ttrpg mechanic

A solo-rpg system, used in games like the Van Witch, Moon Soup, and the Sun Fleet

An SRD for one page solo TTRPGs.

Faff about and find out in this one-page RPG

A narrative TTRPG system.

An SRD for creating games Powered by Sentinel

A dice-pool system for emphasizing teamwork and the magic of friendship

An SRD for creating narrative TTRPGs with cards, dice, and dramatic turning points.

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

A solo journaling system & a noir SF undercover story

Buckle up: it's about to get CUPS in here.

Create your own content based on Firelights

The solo mystery game system

Build and explore communities and their places

Free SRD of the RPG Two Summers / DRS gratuit du JdR Deux Étés

A guide to making solo tarot RPGs

A toolkit for creating card-based solo journaling games.

Free, open license fantasy SRD for TTRPGs

Evolution in game design

Tarot-based SRD for writing single-player TTRPGs

An Introductory TTRPG Design SRD

An ultralight system for creating highly improvisational role-playing games.

SRD en español de la Mark of the odd

A cootie-catcher system built for solo-journaling games.

A system-free ruleset for casting magic through poetry.

A Toolkit For Creating Single-player Exploration Games

An SRD for creating Guided by the Sun games

A Systems Reference Document for Beak, Feather, & Bone

A solo Journaling SRD