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

A TTRPG system designed to be easy to learn, play and adapt

Fuel Your Stories!

Dynamic Interactive Pool-based Engine Roleplaying

Travel to alternate worlds / dimensions / planes. A card-based storytelling game seed.

SRD

Rules Light High Fantasy Roleplaying

An alternate take on the Caltrop Core SRD

Create your own content based on Firelights

An SRD for creating Breathless games.

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

Tarot-based SRD for writing single-player TTRPGs

A toolkit for making your own content for the Slayers RPG.

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

An introductory system for creating gm-less, diceless romantic games

A system designed to be easily adapted to fit whatever story you're trying to tell.

For TTRPGs you design as you play.

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