Lost In The Grey is a 2 page (or 1 page, discounting the cover) solo rpg that is a companion to Found In The Grey.
It has very nearly the same structure and rules, but plays in a sort of endless mode. Using a die and some tables, you generate maps out of your surroundings. There's a little bit of narrative context, but mostly you make your own meaning out of your wanderings.
Overall, I'd recommend this if you don't already have Found In The Grey or do but you want to play an endless version of the game, or if you're interested in a game that generates perfectly viable dungeon maps for you. It's both a cool narrative experience and a neat utility for dungeon-delving games, and it has solid layout and a strong atmosphere.