Gaming machine with challenge feature

A gaming system operable to play a game comprising a base game and a feature game, the gaming system comprising:

• a game controller for controlling the play of the base game and the feature game,
• at least one display in data communication with the game controller to display game play of the base game and the feature game,
• a player interface in data communication with the game controller to enable the player to control at least some aspect of game play of the game,
• the game controller controlling play of the feature game so that:
• a) the feature game comprises at least one series of game events, in which a plurality of symbols from at least one predetermined symbol set that includes at least first and second symbols, are randomly selected and displayed on the at least one display, and
• b) dependent on an outcome of the at least one series of game events, awarding a bonus,
• wherein the feature game is a challenge feature and during play of the feature game, the game controller monitors at least the occurrence of the at least first and second symbols in the at least one series of game events and evaluates the occurrence of the at least first and second symbols against predetermined competitive criteria, wherein the outcome of the series of game events is dependent on said evaluation and wherein the outcome involves one of said at least first and second symbols winning and the others losing and wherein the gaming system is operable to allow a player of the gaming system to use the player interface to select one of said at least first and second symbols, wherein the bonus is awarded only if the symbol selected by the player is the winning symbol in said outcome.