ESCAPE!
ESCAPE! is a fast and simple one page solo RPG where you play a character trying to escape a hostile planet via a tunnel system.
All you need to play is 2d6¸ a pencil and good eraser. Select a starting station and a station for the extraction point. Then roll on a table for each station and tunnel you pass through on the way to the extraction point. Track your progress on the included log. Will you make it?
Alternatively¸ you can download a subway map for a major metropolitan area and use it. There are a lot of great map options on Metro Map Maker .