14. What is an awesome RPG for open-ended campaign play?
This is sort of the opposite of the Day 9 question. Most RPGs work for this, unless they are specifically designed for short play. What really matters is how engaged everyone at the table is, and whether you’re tracking what has gone on from episode to episode so dangling plot threads and interesting NPCs can be reincorporated in play, making the GM’s life easier (the adventures write themselves) and the players’ actions more important (they impact the game world.)
That said, some games make it particularly easy for me, because the mechanics are light enough that statting more NPCs and creating new locations and plots does not create a burden on the GM. I particularly like games based on Fate Accelerated (like War of Ashes or Dresden Files Accelerated), PDQ (like Truth & Justice, Jaws of the Six Serpents, or The Zorcerer of Zo), or Heroquest (like Mythic Russia or of course Glorantha.) Some (not all) games Powered by the Apocalypse work well for this style of play, like Dungeon World or Monster of the Week.