A gaming system, comprising a game controller arranged to control play of a game, and a display arranged to display a representation of play of the game, the game controller being arranged to select a plurality of symbols from a set of symbols for play of the game, to control the display to display a plurality of the selected symbols in rows and columns, to determine a game outcome based on patterns of symbols in the rows and columns, and also being arranged to generate a feature game in response to a trigger condition, and determine an outcome of the feature game depending on the occurrence of a non-linear pattern of symbols.