An Introduction to Black Crusade.
From the back of the book:
BROKEN CHAINS is an introductory adventure for the BLACK CRUSADE roleplaying game. For centuries, the starship Chains of Judgment served the Inquisition of the Imperium, transporting the most dangerous renegades to their doom. Now, however, the Chains of Judgment is lost in the warp. The imprisoned renegades have one chance to escape their fate and take the first steps towards leading a Black Crusade.
BROKEN CHAINS is an introduction to black adventures and eternal damnation in the grim darkness of the far future. Welcome to Warhammer 40,000 roleplay.
A set of basic rules are included to help players and Game Masters become familiar with the BLACK CRUSADE roleplaying game.
This is the Free RPG Day 2011 supplement for Black Crusade