To The Overland is a Solo Tabletop Roleplaying Game that uses a system of card driven encounters to allow a single player to do almost anything with his character alone that he or she could do in a standard roleplaying game. There are rules for learning new skills, obtaining a job, getting married, having children, traveling, training, joining a knightly order, becoming a Dragonslayer, fighting in an arena, forming your own kingdom, usurping the king, defeating a dragon or killing the evil wizard Morcai. All solo!
You can also see a brief description here, where the author compares the system to Barbarian Prince with some nice RPG extras added.
You can back the project on kickstarter if it sounds like something you might enjoy: https://www.kickstarter.com/projects/1235706284/journey-to-the-overland-a-solo-tabletop-roleplayin