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VEN6 is a roleplaying system designed to create narrative storytelling games with conflict mechanics and a GM option.

An alternate take on the Caltrop Core SRD

An SRD for creating DELVE expansions

A System Reference Document for the system used for Pivotal Destinies

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

bare-bones fantasy role-playing with 3 dice

The solo mystery game system

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

An Introductory TTRPG Design SRD

Third Party License Design Kit & SRD for Down We Go

A print friendly & condensed version of Charge.

Build action packed, illuminated RPGs

A lo-fi sci-fi RPG SRD

An OSR adjacent classless, raceless, levelless, and experienceless game system in 25 pages.

A guide to making solo tarot RPGs

A system reference document (powered by the Maze)

Make your own games using Quietus

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

Systems Reference Document and Open Game License

For TTRPGs you design as you play.

How To Make A Bad Time Game!

Little systems for TTRPG designers

The underlying system for all Soft Horizon games. Free!

A retro, Day-Glo, Nitro, freak-show, rainbow system - grab fistfuls of dice and gamble for epic FX!

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

A 3d6 TTRPG system that includes templates and logo.

A toolkit for creating card-based solo journaling games.

Build and explore communities and their places