Gaming system and method for providing awards based on dynamically activated sets of reels

1. A gaming system comprising:

a processor; and

a memory device that stores a plurality of instructions that, when executed by the processor following a triggering of a reel activation sequence, cause the processor to:

for a first activation of the reel activation sequence, cause a display, by a display device, of symbols at a plurality of symbol display positions associated with a first reel set,

independent of any determination of any awards associated with any displayed symbols at any symbol display positions associated with any reel sets and responsive to an additional reel set triggering event randomly occurring in association with the first reel set for the first activation of the reel activation sequence, for a second activation of the reel activation sequence, cause a display, by the display device, of symbols at the plurality of symbol display positions associated with the first reel set, and symbols at a plurality of symbol display positions associated with a second reel set, and

independent of any determination of any awards associated with any displayed symbols at any symbol display positions associated with any reel sets, independent of any determination of any additional reel set triggering event randomly occurring in association with the first reel set for the second activation of the reel activation sequence and responsive to no additional reel set triggering event randomly occurring in association with the second reel set for the second activation of the reel activation sequence:

cause the display, by the display device, of the first reel set without displaying the second reel set, and

thereafter and for a third activation of the reel activation sequence, cause a display, by the display device, of symbols at the plurality of symbol display positions associated with the first reel set.

2. The gaming system of claim 1 , wherein the memory device stores a plurality of further instructions that, when executed by the processor responsive to the additional reel set triggering event randomly occurring in association with the second reel set for the second activation of the reel activation sequence, cause the processor to, for the third activation of the reel activation sequence, cause a display, by the display device, of symbols at the plurality of symbol display positions associated with the first reel set, symbols at the plurality of symbol display positions associated with the second reel set, and symbols at a plurality of symbol display positions associated with a third reel set.

3. The gaming system of claim 2 , wherein the memory device stores a plurality of further instructions that, when executed by the processor independent of any determination of any awards associated with any symbols displayed at any symbol display positions associated with any reel sets, independent of any determination of any additional reel set triggering event randomly occurring in association with the first reel set for the third activation of the reel activation sequence, independent of any determination of any additional reel set triggering event randomly occurring in association with the second reel set for the third activation of the reel activation sequence and responsive to no additional reel set triggering event randomly occurring in association with the third reel set for the third activation of the reel activation sequence, cause the processor to:

cause the display, by the display device, of the first reel set, and the second reel set without displaying the third reel set, and

thereafter and for a fourth activation of the reel activation sequence, cause a display, by the display device, of symbols at the plurality of symbol display positions associated with the first reel set, and symbols at the plurality of symbol display positions associated with the second reel set.

4. The gaming system of claim 2 , wherein for the third activation of the reel activation sequence, a size of at least one of the first reel set, the second reel set and the third reel set is different from a size of the first reel set for the first activation of the reel activation sequence.

5. The gaming system of claim 1 , wherein the memory device stores a plurality of further instructions that, when executed by the processor when no reel sets except for the first reel set are displayed and responsive to no occurrence of the additional reel set triggering event associated with the first reel set, cause the processor to cause a display, by the display device, of a termination of the reel activation sequence.

6. The gaming system of claim 1 , wherein the memory device stores a plurality of further instructions that, when executed by the processor, cause a display, by the display device, of a retriggering of the reel activation sequence upon an accumulation of a threshold quantity of designated symbols displayed at any of the symbol display positions of any of the reel sets.

7. The gaming system of claim 1 , wherein the additional reel set triggering event associated with the first reel set occurs based on a display, by the display device, of a triggering symbol at a symbol display position of the symbol display positions associated with the first reel set.

8. The gaming system of claim 1 , wherein first activation of the reel activation sequence and the second activation of the reel activation sequence occur consecutively.

9. A gaming system comprising:

a processor; and

a memory device that stores a plurality of instructions that, when executed by the processor following a triggering of a reel activation sequence, independent of any determination of any awards associated with any displayed symbols at any symbol display positions associated with any reel sets, and independent of any determination of any additional reel set triggering event randomly occurring in association with a first reel set, cause the processor to:

responsive to an additional reel set triggering event randomly occurring in association with a second reel set, cause a display, by a display device, of symbols at each of a plurality of symbol display positions associated with the first reel set, a plurality of symbol display positions associated with the second reel set, and a plurality of symbol display positions associated with a third reel set, and

responsive to no additional reel set triggering event randomly occurring in association with any second reel set, cause a display, by the display device and without displaying the second reel set, of symbols at the plurality of symbol display positions associated with the first reel set.

10. The gaming system of claim 9 , wherein responsive to the additional reel set triggering event randomly occurring in association with the second reel set, the first reel set is displayed as a first size and responsive to no additional reel set triggering event randomly occurring in association with the second reel set, the first reel set is displayed as a second, different size.

11. The gaming system of claim 9 , wherein the memory device stores a plurality of further instructions that, when executed by the processor when no reel sets except for the first reel set are displayed and responsive to no occurrence of the additional reel set triggering event associated with the first reel set, cause the processor to cause a display, by the display device, of a termination of the reel activation sequence.

12. The gaming system of claim 9 , wherein the memory device stores a plurality of further instructions that, when executed by the processor, cause a display, by the display device, of a retriggering of the reel activation sequence upon an accumulation of a threshold quantity of designated symbols displayed at any of the symbol display positions of any of the reel sets.

13. The gaming system of claim 9 , wherein the additional reel set triggering event associated with the first reel set occurs based on a display, by the display device, of a triggering symbol at a symbol display position of the symbol display positions associated with the first reel set.

14. The gaming system of claim 9 , wherein the second reel set comprises a most recently added reel set.

15. The gaming system of claim 9 , wherein different reel sets are associated with different additional reel set triggering events.

16. The gaming system of claim 9 , wherein the memory device stores a plurality of further instructions that, when executed by the processor responsive to the additional reel set triggering event randomly occurring in association with the second reel set, cause the processor to cause a display, by the display device, of symbols at each of the plurality of symbol display positions associated with the first reel set, the plurality of symbol display positions associated with the second reel set, the plurality of symbol display positions associated with the third reel set, and a plurality of symbol display positions associated with a fourth reel set.

17. A gaming system comprising:

a processor; and

a memory device that stores a plurality of instructions that, when executed by the processor, cause the processor to:

cause a display, by a display device, of a play of a first game associated with a first reel set,

independent of any determination of any awards from the play of the first game and responsive to an additional reel set triggering event randomly occurring in association with the play of the first game, cause a display, by the display device, of a play of a second game associated with the first reel set and a second reel set, and

independent of any determination of any awards from the play of the second game, independent of any determination of any additional reel set triggering event randomly occurring in association with the play of the first game and responsive to no additional reel set triggering event randomly occurring in association with the play of the second game, cause a display, by the display device, of a play of a third game associated with the first reel set and not associated with the second reel set.

18. The gaming system of claim 17 , wherein the memory device stores a plurality of further instructions that, when executed by the processor responsive to the additional reel set triggering event randomly occurring in association with the play of the second game, cause the processor to cause a display, by the display device, of a play of a third game associated with the first reel set, the second reel set and a third reel set.

19. The gaming system of claim 17 , wherein the memory device stores a plurality of further instructions that, when executed by the processor, cause a display, by the display device, of the play of the first game upon an accumulation of a threshold quantity of designated symbols.

20. The gaming system of claim 17 , wherein the additional reel set triggering event associated with the play of the first game occurs based on a display, by the display device, of a triggering symbol in association with the play of the first game.