An electronic method of gaming in a gaming system comprises receiving a selection of one of a plurality game options; forming, based on the selected game option, a set of symbols to be used in the generation of at least one game outcome generating a game outcome with the game controller by selecting subsets of the symbols of the respective reels of the formed set of symbols for display on a display of the gaming system in a plurality of columns of symbol display positions with which the respective reels are associated; and making an award upon the symbols displayed at the symbol display positions in the game outcome including a winning combination of symbols.