Wagering game with single-symbol reel for enhancing winning combinations

1. A method of conducting a wagering game providing an opportunity to earn an increased award, the method comprising:

displaying a randomly selected outcome from a plurality of possible outcomes, the plurality of possible outcomes each including a plurality of symbols arranged in an array;

initially displaying an additional symbol separate from the array;

if the displayed randomly selected outcome includes a winning symbol combination resulting in a first award, determining whether the displayed additional symbol can be combined with the winning symbol combination to yield a second award, the second award being larger than the first award;

providing the first award if the additional symbol cannot be combined with the winning symbol combination to yield the second award; and

providing the larger second award if the additional symbol can be combined with the winning symbol combination to yield the second award, wherein the additional symbol visually modifies one of the plurality of symbols to illustrate the combining of the additional symbol with the winning symbol combination.

2. The method of claim 1 , wherein the plurality of symbols included in the randomly selected outcome is included on a plurality of mechanical multi-symbol reels displayed on a primary display area of the wagering game.

3. The method of claim 2 , wherein the additional symbol is included on a single-symbol reel superimposed on the primary display area via a transmissive display.

4. The method of claim 1 , wherein the additional symbol is a multiplier symbol multiplying the first award by a number to yield the second award.

5. The method of claim 1 , wherein the winning symbol combination is at least three like-symbols appearing along an active payline.

6. The method of claim 5 , wherein the additional symbol matches the three like-symbols of the winning symbol combination.

7. The method of claim 1 , further comprising displaying a second additional symbol separate from the array and the additional symbol.

8. The method of claim 7 , further comprising determining whether the displayed second additional symbol can be combined with the winning symbol combination to yield a third award, the third award being larger than the first award if the displayed plurality of symbols includes a winning symbol combination resulting in a first award.

9. The method of claim 8 , further comprising initiating a free-spin event game or a bonus game from the wagering game, where the displaying of the second additional symbol only occurs in the initiated free-spin-event game or the bonus game.

10. A method of conducting a wagering game allowing an opportunity to form an enhanced winning symbol combination, the method comprising:

receiving a primary wager from the player for playing the wagering game;

initiating the wagering game;

displaying, via a plurality of reels having symbols thereon, a randomly selected outcome for the wagering game;

displaying a supplemental symbol in addition to the randomly selected outcome, the supplemental symbol being initially displayed separately from the plurality of reels; and

in response to the randomly selected outcome forming a winning symbol combination and the supplemental symbol matching the winning symbol combination, combining the supplemental symbol with the winning symbol combination to form an enhanced winning symbol combination,

wherein the supplemental symbol is configured to visually modify one of the plurality of symbols aligned with the winning symbol combination to illustrate the enhanced winning symbol combination in response to the enhanced winning symbol combination being formed.

11. The method of claim 10 , further comprising:

achieving an award corresponding to the winning symbol combination if the supplemental symbol does not match the winning symbol combination; and

achieving an award corresponding to the enhanced winning symbol combination if the supplemental symbol matches the winning symbol combination.

12. The method of claim 10 , wherein the plurality of symbols displaying the randomly selected outcome are included on a plurality of multi-symbol reels displayed on a primary display area of the wagering game.

13. The method of claim 12 , wherein the multi-symbol reels are mechanical reels.

14. The method of claim 13 , wherein the supplemental symbol is included on a single-symbol reel superimposed on the primary display area via a transmissive display.

15. The method of claim 14 , wherein the supplemental symbol visually modifies one of the plurality of symbols by superimposing the supplemental symbol over one of the plurality of symbols aligned with the winning symbol combination.

16. The method claim 10 , further comprising receiving a secondary wager from the player to allow the display of the supplemental symbol.

17. A gaming system for playing a wagering game comprising:

a wager input device for receiving a primary wager to play a game of the wagering game; and

a display for displaying a randomly selected outcome of the game and a supplemental symbol, the randomly selected outcome being indicated by a plurality of symbols arranged in an array, the supplemental symbol initially being unassociated with the array,

wherein a first award is provided in response to the randomly selected outcome forming a winning symbol combination and a second award is provided if the supplemental symbol matches the winning symbol combination, the second award being greater than the first award, the supplemental symbol visually modifying one of the plurality of symbols to illustrate the combining of the supplemental symbol with the winning symbol combination.

18. The gaming system of claim 17 , further comprising a transmissive display for displaying the modification of one of the plurality of symbols with the supplemental symbol, wherein the plurality of symbols are located on a plurality of mechanical multi-symbol reels.

19. The gaming system of claim 18 , wherein the supplemental symbol is located on a single-symbol reel.

20. The method of claim 10 , wherein the supplemental symbol visually modifies one of the plurality of symbols by animating movement of the supplemental symbol as initially displayed through the forming of the enhanced winning symbol combination.