Patent ID: 7758414

Claim:
A method of playing a slot machine game on a computer-based slot machine having at least a processing unit and a display device, the slot machine game using a symbol matrix formed by a plurality of rows intersecting with a plurality of columns, with the plurality of rows and columns including a plurality of symbols, comprising: a) a player making a wager to play the game via a wager input device of the computer-based slot machine; b) the processing unit randomly rearranging the plurality of symbols; c) displaying the rearranged symbols in the symbol matrix on the display device; d) the processing unit automatically expanding wildcard symbols, if displayed in the symbol matrix, such that each wildcard symbol: i) expands by simultaneously occupying two or more positions in the symbol matrix; and ii) expands in all possible directions assigned by directional indicia displayed on said wildcard symbol; e) the processing unit always replacing each symbol in the path of an expanding wildcard symbol with the expanding wildcard symbol; f) the processing unit evaluating winning symbol combinations formed using expanded wildcard symbols, wherein each said wildcard symbol may act as any other symbol of the plurality of symbols in order to form a winning symbol combination; and g) the processing unit issuing awards for winning symbol combinations following the expansion of all wildcard symbols.