A casino wagering game machine includes an electronic display device, electronic input device(s), and controller(s). The controller(s) detect, via at least one of the electronic input device(s), a physical item associated with a monetary value that establishes a credit balance. The controller(s) initiate the casino wagering game responsive to an input indicative of a wager covered by the credit balance and randomly select two or more adjacent reels of a plurality of reels to include one or more sets of adjacent identical symbols. The controller(s) spin and stop the reels with the adjacent identical symbols in each set represented as a single meta-symbol while the reels are spinning, award an award based on any winning outcomes displayed on the stopped reels, adding the award to the credit balance, and receive, via at least one of the electronic input device(s), a cashout input that initiates a payment from the credit balance.
Wagering game with altered probabilities based on reel strip configurations