I love Dr. Who. Here’s a solo game that lets you help the Doctor save the universe. From the game description:
‘Doctor Who’ is a paragraph based solitaire story game. You read various numbered sections one after another but the sequence of the paragraphs is determined by rules and tables. Each describes a new situation, or provides rules about the choices and actions you can make. There are plenty of events and situations, so each game will be a new, fresh experience.
Mephisto is a free print and play game in which you are an adventurer collecting the souls of monsters in a dungeon to fulfil a deal you made with the devil.
Tempus Imperium is a free print-and-play, roll-and-write style game. The twist is that instead of rolling dice to take your actions, you consult the date and time.
From the fertile mind of Andrew Domino comes Monster Menace Monopoly:
All you need for Monsters Menace Monopoly is a copy of the World’s Most Popular Board Game (I don’t know if that’s trademarked, but it feels like it should be). Tired of spending hours going around and around the board buying and selling properties? Why not spend some time going around the board throwing houses and hotels at the other players, and stomping on Boardwalk? These are links for the Monsters Menace Monopoly (PDF format) rules, the monster information sheets (PDF format), and player tokens (PDF format) which you can print and cut out.