Patent ID: 6634941
Filing Date: 2003-10-21
Classification: G07F

Abstract:
A gaming machine having a display means and a game control means arranged to control images displayed on the display means, the game control means being arranged to play a game wherein one or more random events are caused to be displayed on the display means and, if a predefined winning event results, the machine awards a prize, the gaming machine being characterized in that, when a trigger condition occurs in a base game, a feature is triggered comprising at least one secondary game, the playing of the, or each secondary game occurring independently of a result of the base game which triggered the feature and when the, or each secondary game is completed, a special symbol appears at at least one symbol position of the completed secondary game, the special symbol replacing, at least temporarily, an underlying symbol at said symbol position to contribute, if applicable, to a prize winning event and said at least one symbol position at which said special symbol appears being independent of the trigger condition in the base game.