From publisher blurb:
The Unearthed Hack is a Collection of rules variants and extras for use with the Black Hack. Within the pages of this book are rules for character creation, character vs character combat, using non-human races, deadlier missile weapons, defensive tactics, and weaker as well as more powerful foes.
Also featured are 8 character classes, new Arcane and Divine spells, magic weapons and items, new armor types, and hirelings.
Finally, rules for including a new stat that influences Charisma, as well as level drain and an alternative "Out of Action" table with variable outcomes based upon damage type, and... a new character sheet are also included.