Abstract: An embodiment may involve selecting a first bonus set of symbols associated with respective positions of each of a plurality of reels as a first bonus outcome event of the bonus game. The embodiment may further involve incrementing a bonus counter by a number of instances of a predetermined symbol, in the bonus symbol set, that do not contribute to any winning combination. The embodiment may also involve determining that the bonus counter is at least equal to a threshold number. The embodiment may additionally involve selecting a second bonus set of symbols associated with respective positions of each of the reels as a second bonus outcome event of the bonus game, where the second bonus set of symbols includes at least the threshold number of instances of the predetermined symbol, and where the second bonus set of symbols includes a winning combination.

Abstract: An embodiment may involve selecting a set of symbols associated with an outcome event of a reel-based game. The reel-based game may be executed on behalf of a client machine, and selecting the set of symbols may involve spinning a plurality of reels to determine the outcome event. The embodiment may further involve determining that the set of symbols includes a predetermined symbol on a designated reel and does not include any winning combination. The embodiment may also involve, possibly in response to determining that the set of symbols includes the predetermined symbol on the designated reel and does not include any winning combination, replacing one or more symbols in the set of symbols with predetermined symbols such that the symbol set after replacement includes a winning combination.

Abstract: A reel-based game may be executed behalf of a client machine. The game may involve spinning a plurality of reels to determine outcome events. The game may involve selecting a first set of symbols associated with respective positions of each of the reels, where the first set of symbols represents an outcome event of a base game. The game may involve determining that the outcome event includes a trigger event that causes execution of a bonus game, and selecting a second set of symbols associated with respective positions of each of the reels. The game may involve locking instances of a predetermined symbol that are not part of a winning combination, and selecting a third set of symbols associated with the respective positions of each of the reels. The third set of symbols may include the locked predetermined symbols from the second set of symbols.

Abstract: An embodiment may involve selecting a set of symbols associated with an outcome event of a reel-based game. The reel-based game may be executed on behalf of a client machine, and selecting the set of symbols may involve spinning a plurality of reels to determine the outcome event. The embodiment may further involve determining that the set of symbols includes a predetermined symbol on a designated reel and does not include any winning combination. The embodiment may also involve, possibly in response to determining that the set of symbols includes the predetermined symbol on the designated reel and does not include any winning combination, replacing one or more symbols in the set of symbols with predetermined symbols such that the symbol set after replacement includes a winning combination.

Abstract: An embodiment may involve selecting a set of symbols associated with an outcome event of a reel-based game. The reel-based game may be executed on behalf of a client machine, and selecting the set of symbols may involve spinning a plurality of reels to determine the outcome event. The embodiment may further involve determining that the set of symbols includes a predetermined symbol on a designated reel and does not include any winning combination. The embodiment may also involve, possibly in response to determining that the set of symbols includes the predetermined symbol on the designated reel and does not include any winning combination, replacing one or more symbols in the set of symbols with predetermined symbols such that the symbol set after replacement includes a winning combination.

Abstract: A gaming machine may award a number of spins of a plurality of reels in an instance of the bonus game. A symbol counter may be set to an initial value. Until the awarded number of bonus game spins have been performed, the gaming machine may repeatedly carry out iterations of bonus game operations including: (i) selecting a first symbol set or a second symbol set for display on the plurality of reels, where the first symbol set excludes a predetermined symbol, where the second symbol set includes a number of the predetermined symbol equivalent to the symbol counter, and where, when the second symbol set is selected, the symbol counter is incremented, and (ii) transmitting, to a client machine, a representation of the selected symbol set.

Abstract: An embodiment may involve selecting a set of symbols associated with an outcome event of a reel-based game. The reel-based game may be executed on behalf of a client machine, and selecting the set of symbols may involve spinning a plurality of reels to determine the outcome event. The embodiment may further involve determining that the set of symbols includes a predetermined symbol on a designated reel and does not include any winning combination. The embodiment may also involve, possibly in response to determining that the set of symbols includes the predetermined symbol on the designated reel and does not include any winning combination, replacing one or more symbols in the set of symbols with predetermined symbols such that the symbol set after replacement includes a winning combination.

Abstract: An embodiment may involve selecting a first bonus set of symbols associated with respective positions of each of a plurality of reels as a first bonus outcome event of the bonus game. The embodiment may further involve incrementing a bonus counter by a number of instances of a predetermined symbol, in the bonus symbol set, that do not contribute to any winning combination. The embodiment may also involve determining that the bonus counter is at least equal to a threshold number. The embodiment may additionally involve selecting a second bonus set of symbols associated with respective positions of each of the reels as a second bonus outcome event of the bonus game, where the second bonus set of symbols includes at least the threshold number of instances of the predetermined symbol, and where the second bonus set of symbols includes a winning combination.

Abstract: A reel-based game may be executed behalf of a client machine. The game may involve spinning a plurality of reels to determine outcome events. The game may involve selecting a first set of symbols associated with respective positions of each of the reels, where the first set of symbols represents an outcome event of a base game. The game may involve determining that the outcome event includes a trigger event that causes execution of a bonus game, and selecting a second set of symbols associated with respective positions of each of the reels. The game may involve locking instances of a predetermined symbol that are not part of a winning combination, and selecting a third set of symbols associated with the respective positions of each of the reels. The third set of symbols may include the locked predetermined symbols from the second set of symbols.

Abstract: A gaming machine may award a number of spins of a plurality of reels in an instance of the bonus game. A symbol counter may be set to an initial value. Until the awarded number of bonus game spins have been performed, the gaming machine may repeatedly carry out iterations of bonus game operations including: (i) selecting a first symbol set or a second symbol set for display on the plurality of reels, where the first symbol set excludes a predetermined symbol, where the second symbol set includes a number of the predetermined symbol equivalent to the symbol counter, and where, when the second symbol set is selected, the symbol counter is incremented, and (ii) transmitting, to a client machine, a representation of the selected symbol set.