Overview
Risus: The Anything RPG is a universal, rules-light tabletop role-playing game designed by S. John Ross and published by Cumberland Games & Diversions. Originally released in 1993, with its definitive version 2.0 published in 2013, the system was created as a high-velocity framework to run casual, humorous, or completely impromptu gaming sessions across any narrative genre.
Description
Risus prioritizes improvisational storytelling and minimalist mechanics over granular simulation or tactical grid combat. Instead of tracking traditional numeric attributes, skills, or rigid character classes, characters are defined entirely by broad cultural or narrative tropes called "Clichés." The game operates on a high degree of system abstraction, utilizing a completely unified conflict engine where physical combat, intense debates, artistic competitions, and legal battles are resolved using the exact same mathematical pipeline. While frequently utilized for comedic play due to its loose restrictions, the system's structural logic allows it to be scaled for serious or dramatic campaigns.
Links
drivethrurpg.com 
https://www.drivethrurpg.com/en/product/170294/risus-the-anything-rpg - DriveThruRPG store page
(Free)
risusiverse.com https://www.risusiverse.com/ - Risusverse, a community wiki