This list of solo RPGs over on Sophia Brandt’s excellent die heart blog is marvelous.
I’ve never done any “GM emulator”-style solo roleplaying, but I’ve played my fair share of gamebooks, solo roleplaying poems, and card-driven solo story games. This list is packed with stuff I’ve never heard of, much of it free.
Out now: The Unlucky IslesThe Unlucky Isles [affiliate link], the first system-neutral guidebook for my Godsbarrow fantasy campaign setting, is now on DriveThruRPG.