S.O.R.D.: System of Role DevelopmentMaterial-Regelwerk 1996 Internet-Version / 1998 Paper-Version. OOP SORD¸ is a comprehensive universal system in the classic hardcore vein. Not for the faint of heart¸ but thorough.
A universal RPG using a skill-based system¸ with some skill restrictions from chosen Culture and Profession. Resolution is by rolling d20 under skill. Combat uses a d20 somewhat differently (to-hit depends on attribute¸ while damage is modified by skill). - A description from darkshire.net with kind permission of John H. Kim