#$%^&*AU2020202196A120201029.pdf#####ABSTRACT A method may involve determining which slot symbols will be presented on a display system for an instance of a slot game. The symbols may include one or more mystery symbols and one or more trigger symbols. The method may involve controlling the display system to present first visual effects corresponding to the instance of the game. The first visual effects may include moving symbols and landing of the one or more mystery symbols and the one or more trigger symbols. The method may involve controlling the display system to present second visual effects corresponding to the one or more mystery symbols. The second visual effects may include a first revealed mystery symbol image corresponding to a first mystery symbol. The first revealed mystery symbol image and the trigger symbols, taken together, may correspond to a feature award. The method may involve presenting third visual effects corresponding to the feature. 12232516 1 (GHMatters) P113198.AU6/16 Determining which slot symbols will be presented on a display 605 system of an electronic gaming device for an instance of a slot game, the symbols comprising one or more mystery symbols and one or more trigger symbols Controlling the display system to present first visual effects 610 corresponding to the instance of the game, the first visual effects including moving symbols and landing of the one or more mystery symbols and the one or more trigger symbols Controlling the display system to present second visual effects corresponding to the one or more mystery symbols, the second 615 visual effects including a first revealed mystery symbol image corresponding to a first mystery symbol, wherein the first revealed mystery symbol image and the one or more trigger symbols, taken together, correspond to an award of a feature 620 Controlling the display system to present third visual effects corresponding to the feature 600 FIG. 6
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