US Marshals

US Marshals is a rules-light tabletop roleplaying game that assumes the player-characters are Marshals (or Deputy Marshals) in the American Wild West, official representatives of the Federal government of the United States of America enacting the laws, subpoenas, and will of federal courts, Congress, and the President with broad-reaching jurisdiction. All you need to play are these rules, a few scraps of paper, pencils, at least two six-sided dice (2d6), and a few friends! One person runs the game as the Gamemaster (GM), while everyone else plays as a Marshal; the more the merrier! - from the publisher's blurb