"Chivalry and Sorcery is a fantasy role-playing game that was first published in 1977 by Fantasy Games Unlimited. It is a game set apart by its approach to fantasy that is grounded in the historical Middle Ages, including a magic system based loosely on the beliefs of the time. The third edition was published by Highlander Games. Its current incarnation, Chivalry and Sorcery: The Rebirth, is published by Britannia Game Designs. Chivalry & Sorcery was originally created by Edward E. Simbalist and Wilf K. Backhaus of Alberta.
There are three editions as of 2009."
Source: Wikipedia, "Chivalry_and_Sorcery", available under the CC-BY-SA License.