Noted Solo RPG author Peter Rudin-Burgess brings solo roleplaying to Heroes & Hardships!
Lone Hero discusses techniques to help players engage in solo roleplay, included are:
 
Introduction to solo roleplay;
Solo questions and answers for dynamic results;
Improvisation techniques;
Word & Image prompts;
Solo scene setup instructions;
Ways to build drama;
Using "Fake AI";
Structuring adventures;
Solo advice;
And dozens of icons and word lists for your solo prompts.