Wagering game with multiple unlockable arrays

A gaming system for conducting a wagering game includes an input device, a display device, a processor, and a memory device. The memory device stores instructions that, when executed by the processor, cause the gaming system to receive a wager in response to an input, display a main array of symbol-bearing reels, and to display a plurality of enhanced arrays. The main array includes a plurality of enhanced-array triggers. Each enhanced array includes an enhancement feature and each enhanced array is associated with at least one of the plurality of enhanced-array triggers. The enhanced arrays are spun and evaluated upon display of the associated enhanced-array triggers.