Comment by szczepu
It isn't as obvious as it maybe should be, but in classic text-based adventure fashion you can also type your own 'actions' (in addition to the four default choices). We use LLMs to basically manage incorporating any player actions without letting them derail the story (too much).
There's also some caching involved which resets every 24 hours, so you will have a slightly different experience each time you play through (even if you choose the same character).
I also love the whole early 2000s ARG stuff I think it was a big part of the inspiration for the movie.