Games with Dynamically Modifiable Prizes Based on Game Winning Symbol Positions

An electronic gaming machine comprising a game controller, a player interface, and a display device, wherein the game controller executes instructions from a memory which cause the game controller to at least:

• display a plurality of symbol display positions;
• display a bonus array comprising a plurality of visual elements, each visual element being uniquely associated with a symbol display position from the plurality of symbol display positions during play of a base game, at least one visual element indicating a bonus award;
• select a symbol, from a group of symbols including one or more trigger symbols and one or more non-trigger symbols, for display at each of the plurality of symbol display positions;
• determine whether at least one of the plurality of symbol display positions contains the one or more trigger symbols;
• and
• upon determining that the at least one of the plurality of symbol display positions contains the one or more trigger symbols, determine a modification to a base prize, if any, based at least in part on a visual element associated with the at least one of the plurality of symbol display positions containing the one or more trigger symbols.