Like your games compact? These role-playing games are two or three pages.
The first three games feature the Diceconomy system, which allows three players to competitively control the course of the game’s narrative. They’re also free to download and share under a Creative Commons 3.0 BY-NC-SA license.
Phenomengineers is an “infectious game fragment”. Once you read it, you’re playing it.
Monoliths of Titan was created for National Game Design Month 2012.
Spectrum is an ongoing open-source generic game system project. Current version of Spectrum Prime, the core document, is v1.4.2, downloadable here.