Blood & Bullets: is a role-playing game set in the Wild West. It is based on a set of 'old school' fantasy role playing rules, which itself was based on the first fantasy role playing game.
You are free to publish your own adventures, house-rules, and any other sort of materials designed for this game. Guidelines and requirements are at the end of the book.
Blood & Bullets isn’t necessarily intended to be an accurate history lesson; it is designed primarily as an old western game utilizing, and to be more-or-less compatible with, the Swords & Wizardry rule set. Historical accuracy isn't even the secondary goal, which is really to create a game that gives you the feel and trappings of the Old West without having to get too bogged down in the who's, why's, what's and where's.