You are Your Own GM (YaYoG)

Publisher's blurb: YaYoG empowers players to make decisions and ruling without needing to find a GM or interrupt the flow of the game. However, you are still beholden to the rules of the game, to the rules of drama, and to being fair. It becomes your job to make the game more enjoyable for everyone; luckily, you are empowered to do just that. User summary: You are Your Own GM is a concise alternative rule to enable LARP play without gamemasters.