Roleplaying Adventures in the English Civil War From the introduction: Roundheads & Cavaliers is a historical role-playing game set in the time of the English Civil War of the middle part of the 17th Century. In this game the characters that you play are caught up in or to some degree affected by the troubles of the war. Unlike many other role-playing games this game is intended to be purely based on history and so there is no magic at all.