Free pen-and-paper roleplaying games designed to be used in a variety of gaming genres.
Free multigenere RPG system. Currently has fantasy and SuperHeroe rules.
Contains to free games: Alternacy, featuring character-driven skill development; and Mnemonic, a minimal rules, memorizable system designed for portability.
A universal RPG by Chieh Cheng. Approx. 33 pages HTML rules, plus four 10-15 page genre books (fantasy, modern, near-future).
A small set of rules suitable for running campaigns of independent backgrounds. Open content license, downloadable in PDF format.
A simple, universal system, with a stable core rule, a complete foundation, and plenty of room for modifications. Free to all.
Freeform organic diceless system that puts system mechanics in the hands of the users.
Ex Mortis base role playing system. Free to the public. Fully functional RPG.
Works with any time period and genre, includes 16 species, magic and monster systems, and realistic rules all of which are optional.
Skill- and attribute-based rules designed to fit on one page.
A free, one page, generic game system.
Free 32 page PDF version of the GURPS rules. "Covers the essentials of character creation, combat, success rolls, magic, adventuring, and game mastering."
Light-weight role playing game rule system which emphasizes simplicity as well as the scenario and fluently progressing plots.
Generic role-playing game. Official site.
Freely available rules for a multi-genre role-playing game and supplements.
Series of interlocking games that focus a little more on love (both in the ideal and carnal sense) than those that have proceeded it.
One page gaming system for super heroes.
Simple one page gaming system.
A modular system that is adaptable to many styles of play.
A versatile multi-genre free RPG by Frank J. Perricone. It is a modular system originally intended for use with Rolemaster's combat system. Over 100 pages, illustrated.
Foundations for a game system, reference implementation of that system and resource page to develop game worlds.
A small system using attribute based dice pools.
A two page generic skill and attribute based roleplaying engine, focused on characters and stories.
Simple, Laid-back Universal Game. By Steffan O'Sullivan.
Flexible, modular rules built around three gaming precepts.
Features a free, universal roleplaying game system. Also includes supplements for the fantasy and Doctor Who genres.
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