Alpha-Zulu Games
Contains to free games: Alternacy, featuring character-driven skill development; and Mnemonic, a minimal rules, memorizable system designed for portability.
Cosmic Synchronicity RPG
A free RPG that incorporates concepts of Jungian psychology and Robert Anton Wilson's writings to produce a multi-genre cross-worlds playing environment.
Cyno's Roleplay
A universal RPG by Chieh Cheng. Approx. 33 pages HTML rules, plus four approx. 10-15 page genre books (fantasy, modern, near-future).
Dramats Personae
Free simple role-playing system; there are no statistics, little math, no complex charts of equipment, and no magic. Characters represent skilled, but human (or roughly human), bei…
GURPS Lite
Free 32 page PDF version of the GURPS rules. "Covers the essentials of character creation, combat, success rolls, magic, adventuring, and game mastering."
Impresa Modular Roleplaying System
Modular RPG construction set. Free express rules for download include open collaborative license.
Oroborus multi-genre RPG
Rules light, point allocation, skill based game from Ragnarok Press.
Percentile Dice Game System
A 2 ten sided dice using system released under the Free Gaming License.
Quasar Role-Playing Game
Public domain rules intended for family-friendly roleplaying.
The Awakenings Rules Engine
TARE, a universal rules engine. The complete basic rules are currently free, with two commercial campaign settings available for it.
The Ladder
A generic rules-lite roleplaying game that utilises neat little character descriptions and a five-rung ladder of task results as the core mechanic.
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