Tournament Arc uses the Belonging Outside Belonging system! It's a GM-less (or "GM-ful") system where everyone takes cahrge of the narrative, rather than one designated player. Each playbook comes with prompts for what you might do in a given situation, and there's a token system that allows you to use more narratively challenging moves. Tournament Arc adds in Episodes which have their own prompts, which help you and your play group create a fun story with your characters!