The supplement is in electronic format only and puts together in an organic way a lot of updates published for the game. In the supplement many optional rules are found too as are errata and emendaments to the rules. From the back cover: "This PDF downloadable supplement brings together a handful of amendments to the Death In The Dark Continent rules with some optional rules for stratagems and psychological warfare, and the full set of rewritten army lists. They have now been brought together into one definitive collection." NOTE: As per my conversation with the creator, this PDF is no longer available for download because the information in it is included in the newest printing of the rule book.