Gaming system and a method of gaming

1. A gaming machine comprising:

a credit input operable to establish a credit balance;

a display device;

a player interface operable to receive one of a plurality of player selections; and

a game controller comprising a hardware-implemented random number generator, a processor, and a memory storing a) a set of symbols for a plurality of reels, and b) instructions, which, when executed, cause the processor to at least:

generate a random outcome via the hardware-implemented random number generator,

select a plurality of symbols from the set of symbols based on the random outcome;

control the display device to display the plurality of symbols selected at a plurality of display positions,

receive via the player interface a first player selection of a first symbol located at a first display position and a second player selection of a second display position having a second symbol, wherein, if the first player selection and the second player selection are not received within a predefined period of time, the instructions, when executed, further cause the processor to select the first symbol located at the first display position and the second display position, to obtain an optimal selection in order to maximize a win outcome,

control the display device to modify the second display position from displaying the second symbol alone to displaying both the first symbol and the second symbol,

control the display device to modify the first display position from displaying the first symbol to displaying a predetermined replacement symbol associated with the first display position, and

determine a game outcome based on the symbols displayed after modification of the second display position to have the first symbol,

wherein, after the first symbol is displayed at the second display position, the instructions, when executed, further cause the processor to retain the first symbol in the second display position for at least one subsequent selection and display of symbols.

2. The gaming machine as claimed in claim 1 , wherein the instructions, when executed, further cause the processor to allow movement of the first symbol to any display position.

3. The gaming machine as claimed in claim 1 , wherein the instructions, when executed, further cause the processor to limit the second display position only to display positions adjacent to the first display position.

4. The gaming machine as claimed in claim 1 , wherein the instructions, when executed, further cause the processor to recommend to a player the second display position.

5. The gaming machine as claimed in claim 1 , wherein the instructions, when executed, further cause the processor to limit the first symbol to be only moveable once.

6. The gaming machine as claimed in claim 1 , wherein the instructions, when executed, further cause the processor to operate in a normal game mode and a special game mode, and wherein the player interface is operable by a player to modify the second display position of the second symbol only in the special game mode.

7. The gaming machine as claimed in claim 1 , wherein a total number of modifications of the display positions allowed for one or more of the plurality of symbols during play of a game is purchased by a player.

8. A method of gaming in a gaming machine having a credit input operable to establish a credit balance, a display device having a plurality of display positions, each display position being associated with a predetermined replacement symbol, a player interface operable to receive a plurality of player selections, and a game controller comprising a hardware-implemented random number generator, a processor, and a memory storing a set of symbols and instructions, which, when executed, cause the processor to initiate a game, the method comprising:

generating a random outcome via the hardware-implemented random number generator;

selecting based on the random outcome, via the game controller, a plurality of symbols from the set of symbols and controlling the display device to display the plurality of symbols selected at the plurality of display positions;

receiving via the player interface a first of the player selections of a first symbol located at a first display position and a second of the player selections of a second display position having a second symbol, and, in response to not receiving the first of the player selections and the second of the player selections within a predefined period of time, selecting the first symbol located at the first display position and the second display position to obtain an optimal selection in order to maximize a win outcome;

modifying via the game controller the second display position from displaying the second symbol alone to displaying both a) the first symbol and b) the second symbol;

receiving via the player interface a third of the player selections to modify the first display position from displaying the first symbol to displaying the predetermined replacement symbol associated with the first display position;

displaying the first symbol at the second display position;

determining a game outcome based on the symbols displayed after modification of the second display position to have the first symbol; and

retaining the first symbol in the second display position after the first symbol is moved to the second display position for at least one subsequent selection and display of symbols.

9. The method as claimed in claim 8 , wherein all of the symbols selected are available for movement by a player.

10. The method as claimed in claim 8 , further comprising allowing movement of the first symbol to any display position.

11. The method as claimed in claim 8 , further comprising limiting the second display position only to display positions adjacent to the first display position.

12. The method as claimed in claim 8 , further comprising recommending to a player the second display position.

13. The method as claimed in claim 8 , further comprising allowing the first symbol to be moved only once.

14. A gaming machine, comprising:

a display device;

a player interface operable to receive one of a plurality of player selections; and

a game controller comprising a hardware-implemented random number generator, a processor and a memory storing a) a set of symbols for a plurality of reels, and b) instructions, which, when executed, cause the processor to at least:

generate a random outcome via the hardware-implemented random number generator,

select a plurality of symbols from the set of symbols based on the random outcome;

cause the display device to display the plurality of symbols selected at a plurality of display positions on the display device,

receive from the player interface a first selection of a first display position having a first symbol and a second selection of a second display position having a second symbol;

control the display device to modify the second display position from displaying the second symbol to displaying the first symbol,

control the display device to modify the first display position from displaying the first symbol to displaying a replacement symbol, and

control the display device to retain the first symbol in the second display position for at least one subsequent selection and display of symbols.

15. The gaming machine of claim 14 , wherein execution of the instructions by the game controller, further cause the processor to determine a game outcome based on the symbols displayed following modification of the first display position and the second display position to have the replacement symbol and the first symbol, respectively.

16. The gaming machine of claim 14 , wherein the instructions, when executed, further cause the processor to randomly select the replacement symbol based on a second random outcome generated by the random number generator.

17. The gaming machine of claim 14 , wherein each display position is associated with a respective predetermined replacement symbol.