The Black Hack Main Rulebook
The Black Hack is a super-streamlined roleplaying game that uses the Original 1970s Fantasy Roleplaying Game as a base, and could well be the most straightforward modern OSR compatible clone available. If speed of play and character creation, compatibility, and simple - yet elegant rules are what you yearn for. Look no further!
The Black Hack is a fast playing game and the rules can be picked up in minutes. The full rules fit in a single 20 page A5 book!
A PDF edition of this book is also available from RPGNow.com here: http://www.rpgnow.com/product/178359/The-Black-Hack