A gaming system including a cascading symbol game which utilizes a plurality of adjacent symbol display position grids arranged at different depths. The multiple symbol display position grids at different depths provides that one or more of the symbols of at least a first symbol display position grid at a first depth are displayed to a player while one or more of the symbols of at least a second symbol display position grid at a second depth are not displayed to the player. When one or more symbols are removed from the first symbol display position grid at the first depth, before and/or after shifting the remaining displayed symbols from the first symbol display position grid into created empty symbol display positions of the first symbol display position grid, one or more symbols from the second symbol display position grid at the second depth become exposed.