Some time ago I wrote a proof-of-concept automatically generated game that is somewhere between interactive fiction, MOO/MUD and AI dungeon. It’s an homage to terminal-based games of yore. You (if you host it yourself) provide a world description (like a writing prompt) and the world and its denizens are generated automatically. Unlike AI dungeon, the characters, places, events and objects persist in a database and are common to users.
It’s not great at world-modelling (I made the mistake of implementing all that myself rather than leaning on existing methods) but it excels at dialogue and atmosphere.
I am aware that LLMs are potentially a divisive topic here.
You can try some public worlds I have made available – see the website chasm.run – but you’d have to install a client yourself, which is fiddly and requires python, and I don’t know if it would work on windows.
I think any future rewrite would make the whole system more constrained and less “free-range”. It’s hard to create puzzles when you can essentially do anything.