Patent attributes
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.
