From The Riddle of Steel Wiki (according to Jim)
This wiki contains the core Riddle of Steel rules. I have decided to exclude setting specific information, as I (and I am sure others as well) have various worlds and settings, and I would like the rules to be separate from the setting. It is also important to note that I have changed many rules to suit my own needs and wants in the game. As well, there are additional rules added simply because the rules just didn't cover all (or even most) situations. Either way, enjoy the wiki and keep searching.