The Mountain Witch
A role-playing game with a built-in adventure: a group of ronin samurai are hired to assault and kill O-Yanma¸ the dreaded Mountain Witch of Mount Fuji. It uses a simple resolution system¸ with player-created Fates for their characters and a system of Trust which focuses play on trust and betrayals among the PCs. - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim