Lone Star: Solo Rules for Mothership RPG

From the introduction:

Solo Role-Play is a bit different. In this form of the game, the role of the Warden is emulated using a few tables. How? The Warden is there to set up the opening scene, where the game starts and to answer your questions so you understand what your character can see, hear and do. This book provides simple tables to answer those questions for you. In addition to these question-answering tables, there are some simple guidelines to help you run a game to make the most of what solo has to offer.