There's a concept called 'solo journaling RPGs' - the idea is that it's essentially a very lite set of rules that you use to generate writing prompts for yourself. The game gives you some loose guidelines for what to write about, and then you write journal entries as if you had experienced that thing, with the details being very largely open to your own imagination and interpretation.
Edit: In fact, if this concept is interesting to you, itch.io is currently offering a bundle to raise money for the Immigrant Law Center of Minnesota, which includes a lot of solo journaling RPGs, in addition to some other things.