"This is a short universal RPG system¸ although as originally published it only supported fantasy or early history. The original booklet was intended as an introduction for beginners to Chaosium's RuneQuest¸ Call of Cthulhu¸ and Stormbringer games. These used roughly the same system which BRP explained. BRP is a percentile skill system: roll under skill(0-100) on percentile dice¸ or roll on the ""resistance table"" for attribute (3-18) vs difficulty. Character creation is random-roll attributes. In the introductory booklet¸ skills are fixed but can be improved with experience. In 1982¸ the booklet was packaged with 3 genre books in Worlds of Wonder. - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim"