I am a specialist in solo role-play tools, random oracles and optional rules that let you play popular pen and paper role-playing games without a GM/DM.
Each booklet that I make is created to fit a specific game but carefully matching the style of play and the game mechanics of the original so if you are in the right head space to play your favourite game you don't have to come out of it just to use the add on solo rules.
You can follow my game developments on my blog http://www.ppmgames.co.uk/ or on YouTube.