Systems, methods and devices for playing wagering games with randomized clumping of symbols

Gaming devices, gaming systems, methods of conducting a wagering game, and computer programs for initiating a wagering game are presented herein. A gaming system is presented that includes a wager input device, a display device, and game-logic circuitry. The wager input device receives wagers from players to play the wagering game. The display device displays outcomes of the wagering game via a plurality of symbol-bearing reels each having a plurality of symbol positions occupied by symbols, at least one of the reels having a designated clump area comprising a predetermined number of the symbol positions. Prior to displaying the outcome of the wagering game, the game-logic circuitry randomly determines whether to include a symbol clump in the designated clump area, the symbol clump comprising a plurality of identical symbols occupying adjacent ones of the symbol positions within the designated clump area. A symbol clump comprises one or more identical symbols occupying two or more symbol positions located immediately adjacent one another on one reel. The game-logic circuitry directs the display device to display the symbol-bearing reels spinning and stopping to present a randomly determined outcome of the casino wagering game.