The Grit System SRD

Intuitive rolling.
Unforgetable powers.

The Grit System is a tabletop roleplaying game (TTRPG) engine that was designed to help players new and old weave stories that contain moments of high drama—and to let the players direct that drama. The Grit System's dice-rolling is intuitive, and its powers are unforgettable.

The designers set up this combination of features to support all genres of game, from the simplest of dungeon-delves to the most biting political satire. The Grit System is a "rules-bright" set of rules in which a player character's scores are dice, and they have a resource called grit (GRT) that can fuel special powers or boost any roll.

The Grit System powers the sci-fi roleplaying game Stillfleet, the cartoon animal eco-apocalypse game Blister Critters, the low-fantasy historical game Danse Macabre: Medieval Horror Roleplaying, the high-fantasy portal fantasy game The Sometimes Kingdom RPG, and many other games to come. Get the simplified rules system reference document (SRD).

What’s inside

This 52-page book functions as both a system reference document (SRD) for the Grit System as well as a standalone science-fantasy game, complete with different playable classes, species, Weird powers (spells), rules for level gain and advanced powers, tables of gear and treasures, and full encounters ranging from clockwork gorillas to cultists to warmachines.

Make your own Grit-powered games

Using the Grit System License (link inside), you can design your own epic, narrative-focused games and even sell them commercially. Just credit the Stillfleet Studio and use the Grit System logo.

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SFS70111 ☉ The Grit System One-Page System Reference Document [Digital]
Version 1.0 ☉ October, 2025
System design and writing by Wythe Marschall
Graphic design and layout by Anthony Grasso
Art by Ethan Gould, Anthony Grasso, and Christopher Pickett

© 2025 Wythe Marschall and Stillfleet Studio