From publisher blurb:
Welcome to Black Spear, dangerous adventure in an enigmatic, ancient world. Black Spear has taken the core of Openquest, pared it down for the sake of simplicity, and added modern table-top gaming philosophy to create compelling, snappy updates to the D100 system suitable for the intended themes of the game.
Black Spear aspires to accomplish rapid, deadly combat, compelling roleplay, and an overall free and simple manner of play using underutilized themes and set-pieces. It identifies as seeking to hold up the OSR way of things. The world is young, mysterious, with the unknown lying just beyond the pastures. Times are changing- can the people of the Marchlands survive these dark times?
Black Spear was written using Openquest as a base, and while it is no longer quite Openquest, it does use pieces of it.