A method of gaming comprising providing a plurality of display positions and selecting a plurality of symbols for display at respective display positions. A base pay table is defined and is usable to determine a prize for a winning outcome when a winning outcome associated with a particular prize comprising a defined win combination of x symbols occurs. It is determined whether a winning outcome exists and, during normal game mode, the base pay table is used to determine a particular prize applicable for a winning outcome when the winning outcome occurs. It is also determined whether a trigger condition exists and if the trigger condition is determined, special game mode is implemented during which the special pay table is used to determine a particular prize applicable for a winning outcome when the winning outcome occurs.