After playing it last night, Shawn Tomkin's Ironsworn has probably become my new favorite RPG for multiple session play! It is elegant, flexible, and evocative. I will try not to burden this review with too much detail on the mechanical design. I'll just say, as a gamewright, I am thoroughly impressed. It has de-throned Dungeon World as my go-to game for campaign play. It's marvelously innovative and deliriously fun! I hope you give it a try soon!
Laura Simpson's Companions' Tale is a lovely storytelling game where players draw maps, build cultures, and tell of a hero's quest through the voices of unreliable narrators. The various phases of the game rotate the focus and duties of each of the players, ensuring the world and story feel sincerely communal. Your whole story will play out in one game session.