Earlier quoted context omitted.
Malyon it's a ZMachine interpreter which works mostly fine.
Playing "This thing all things devours" is one of the most profound gaming experiences I have had, and I happened to use Malyon. Why wouldn't I use the best text editor to play an inform game?
https://jxself.org/git/devours.git
Spiritwrak it's Zorkian but libre licensed unlike Zork [1-3] / Dungeon.
And, OFC, Emacs has Inform-mode, a helper for Inform6 and Inform6-lib.