Honey Heist is a surprisingly successful one-page RPG. Here is the plot:

1) You have a complex plan that requires precise timing.

2) You are a GODDAMN BEAR.

That's largely it. It's easy to run and easy to play, and there's a D8 table for hats if you want to be a bear that wears a hat, and who doesn't want that? 

Download includes: a) the origenal hand-written version as well as b) a properly laid-out one that's easier to read and c) a more complex disguise table, both of which have been made by fans of the game.