Gaming system and a method of gaming

1. A gaming system comprising:

a display;

a symbol selector arranged to select a plurality of symbols for display at a plurality of display positions on the display;

a display modifier arranged to modify the displayed symbols such that after modification of the symbols the locations of the symbols in the display positions are a mirror image of the locations of the symbols before modification of the symbols; and

an outcome evaluator arranged to determine whether symbol combinations defined by the displayed symbols after modification correspond to one or more winning outcomes.

2. A gaming system as claimed in claim 1 , comprising a prize allocator arranged to allocate a prize to a player when a symbol combination corresponds to a winning outcome.

3. A gaming system as claimed in claim 1 , wherein the outcome evaluator is arranged to determine whether symbol combinations defined by the displayed symbols correspond to one or more winning outcomes by reference to a player win entitlement.

4. A gaming system as claimed in claim 3 , wherein the win entitlement is dependent on whether a player has purchased one or more win lines, has purchased particular reels, or has purchased particular symbols.

5. A gaming system as claimed in claim 1 , wherein the display modifier is arranged to modify the displayed symbols such that after modification of the symbols the locations of the symbols are a mirror image of the locations of the symbols before modification of the symbols about a line extending vertically of the displayed symbols.

6. A gaming system as claimed in claim 1 , wherein the display modifier is arranged to modify the displayed symbols such that after modification of the symbols the locations of the symbols are a mirror image of the locations of the symbols before modification of the symbols about a line extending horizontally of the displayed symbols.

7. A gaming system as claimed in claim 1 , wherein the display modifier is arranged to modify the displayed symbols such that after modification the symbols are inverted.

8. A gaming system as claimed in claim 7 , wherein the display modifier is arranged to modify the displayed symbols such that after modification the symbols are shown laterally inverted.

9. A gaming system as claimed in claim 7 , wherein the display modifier is arranged to modify the displayed symbols such that after modification the symbols are shown upside down.

10. A gaming system as claimed in claim 1 , wherein the outcome evaluator is arranged to determine whether symbol combinations defined by the displayed symbols correspond to one or more winning outcomes both before and after modification of the displayed symbols, and the prize allocator is arranged to allocate a prize to a player when a symbol combination corresponds to a winning outcome before and/or after modification of the symbols.

11. A gaming system as claimed in claim 1 , wherein at least one set of symbols includes at least one function symbol having an associated function.

12. A gaming system as claimed in claim 11 , wherein the function is a wild function, a scatter function, a multiplier function, a repeat win function or a jackpot function.

13. A gaming system as claimed in claim 1 , wherein the gaming system is arranged to operate in normal game mode and special game mode, and the display modifier is arranged to modify the displayed symbols only when the gaming system operates in special game mode.

14. A gaming system as claimed in claim 13 , wherein the gaming system is arranged to commence special game mode when a predetermined game outcome occurs, on the basis of a game event occurring during a game, in response to player input, based on the amount or type of bet placed, or when a special game is purchased by a player.

15. A gaming system as claimed in claim 1 , wherein the gaming system is implemented as a stand alone gaming machine or across a network.

16. A method of gaming comprising:

selecting a plurality of symbols for display at a plurality of display positions;

modifying the displayed symbols such that after modification of the symbols the locations of the symbols in the display positions are a mirror image of the locations of the symbols before modification of the symbols; and

determining whether symbol combinations defined by the displayed symbols after modification correspond to one or more winning outcomes.

17. A method as claimed in claim 16 , comprising allocating a prize to a player when a symbol combination corresponds to a winning outcome.

18. A method as claimed in claim 16 , comprising determining whether symbol combinations defined by the displayed symbols correspond to one or more winning outcomes by reference to a player win entitlement.

19. A method as claimed in claim 18 , wherein the win entitlement is dependent on whether a player has purchased one or more win lines, has purchased particular reels, or has purchased particular symbols.

20. A method as claimed in claim 16 , comprising modifying the displayed symbols such that after modification of the symbols the locations of the symbols are a mirror image of the locations of the symbols before modification of the symbols about a line extending vertically of the displayed symbols.

21. A method as claimed in claim 16 , comprising modifying the displayed symbols such that after modification of the symbols the locations of the symbols are a mirror image of the locations of the symbols before modification of the symbols about a line extending horizontally of the displayed symbols.

22. A method as claimed in claim 16 , comprising modifying the displayed symbols such that after modification the symbols are inverted.

23. A method as claimed in claim 22 , comprising modifying the displayed symbols such that after modification the symbols are shown laterally inverted.

24. A method as claimed in claim 22 , comprising modifying the displayed symbols such that after modification the symbols are shown upside down.

25. A method as claimed in claim 16 , comprising determining whether symbol combinations defined by the displayed symbols correspond to one or more winning outcomes both before and after modification of the displayed symbols.

26. A method as claimed in claim 16 , comprising allocating a function to at least one symbol.

27. A method as claimed in claim 26 , wherein the function is a wild function, a scatter function, a multiplier function, a repeat win function or a jackpot function.

28. A method as claimed in claim 16 , comprising providing normal game mode and special game mode, and modifying the displayed symbols only when the method operates in special game mode.

29. A method as claimed in claim 28 , comprising commencing special game mode when a predetermined game outcome occurs, on the basis of a game event occurring during a game, in response to player input, based on the amount or type of bet placed, or when a special game is purchased by a player.

30. A computer readable medium having computer readable program code embodied therein for causing a computer to operate in accordance with a gaming system comprising:

a display;

a symbol selector arranged to select a plurality of symbols for display at a plurality of display positions on the display;

a display modifier arranged to modify the displayed symbols such that after modification of the symbols the locations of the symbols in the display positions are a mirror image of the locations of the symbols before modification of the symbols; and

an outcome evaluator arranged to determine whether symbol combinations defined by the displayed symbols after modification correspond to one or more winning outcomes.