This could be pretty great for a play through of Thousand Year Old Vampire, a pretty terrific journaling game: https://thousandyearoldvampire.com/

And I suppose other RPGs, too, especially ones that are more story-than-dice driven, and/or set in the "real" world.

This can be great - Tom from the Yogscast has run a few of these, and they can get pretty wild. It's a simple premise but works well.