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So simple, even you could design it!

Flexible way to add deck-like gameplay with dice.

Build any world you want to play in.

An SRD for making TTRPGs focused on player agency, customisation and narrative role-play.

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

A System Reference Document for Lay On Hands

Build and explore communities and their places

Additional rules to extend Cezar Capacle's PUSH SRD

Little systems for TTRPG designers

Make your own stealth based roleplaying games using the engine behind Night Reign

Free, open license fantasy SRD for TTRPGs

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

An SRD for probability building diceless gaming!

A toolkit for creating card-based solo journaling games.

Third Party License Design Kit & SRD for Down We Go

An SRD for one page solo TTRPGs.

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

Fuel Your Stories!

A setting agnostic Cooperative Storytelling Game + SRD

A lo-fi sci-fi RPG SRD

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

Simple FitD roleplaying for any setting

System Reference Document for the Four Points RPG System

A guide to creating a one-page ttrpg.

An Introductory TTRPG Design SRD

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

An SRD for creating Breathless games.

An SRD to make action packed RPGs with forward momentum.

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