Outlaws of Triune
As described on John Ross’ website
Risus is a complete Role Playing Game (RPG) designed to provide an “RPG Lite” for those nights when the brain is too tired for exacting detail.
I recently discovered Risus, even though its been around for 10 years, and instantly fell in love with the elegant simplicity of the ruleset. I understand it wasn’t designed for ‘serious’ play, but I have also incorporated a number of house rules and modifications so I think it will work just fine for this campaign.
You can check out the orginal pdf here (its just 6 pages!).