Method of gaming, a gaming system and a game controller

A game controller comprising:

• a symbol selector arranged to select a first set of normal symbols to be displayed by a display at a plurality of display positions and to display at least one special symbol at a display position in a first play round and to subsequently select a further set of normal symbols for each of one or more further play round, further play rounds being conducted until an end condition is met;
• a special symbol controller arranged to:
• retain each at least one special symbol in one or more further play rounds until the second condition is met, and
• select at random a new display position for each retained special symbol in each further play round;
• and
• an outcome generator arranged to determine game outcomes for each of the play rounds based on the display position of each special symbol and the set of normal symbols displayed in that play round.

A gaming system comprising:

• a display;
• a symbol selector arranged to select a first set of normal symbols to be displayed by the display at a plurality of display positions and to display at least one special symbol at a display position in a first play round and to subsequently select a further set of normal symbols for each of one or more further play round, further play rounds being conducted until an end condition is met;
• a special symbol controller arranged to:
• retain each at least one special symbol in one or more further play rounds until the second condition is met, and
• select at random a new display position for each retained special symbol in each further play round;
• and
• an outcome generator arranged to determine game outcomes for each of the play rounds based on the display position each special symbol and the set of normal symbols displayed in that play round.

Computer readable program code, which when executed by a computer causes the computer to implement a computer implemented method of gaming comprising:

• conducting an initial play round comprising:
• selecting and displaying a first set of normal symbols at a plurality of display positions;
• displaying at least one special symbol at a display position;
• determining a game outcome based on each at least one special symbol and the first set of normal symbols, and
• conducting one or more further play rounds until an end condition is met comprising:
• retaining each at least one special symbol from the previous play round;
• selecting a new display position at random for each special symbol;
• selecting and displaying a further set of normal symbols at a plurality of display positions;
• and
• determining a further game outcome based on the new display position of each special symbol and the further set of normal symbols.