Abstract: A gaming system for play of a base game, and arranged to detect a trigger condition during the base game. A feature game is implemented when a feature game frequency criterion is met. The feature game frequency criterion may be based on the number of base games having been implemented since the last implementation of a feature game.

Abstract: A gaming system is disclosed which comprises a plurality of display positions disposed in a display area, a symbol selector arranged to select a plurality of symbols for display at respective display positions, and an outcome evaluator arranged to determine whether the selected symbols correspond to a winning outcome with reference to at least one of a plurality of defined win lines. Each of the defined win lines comprises at least one display position, and at least some of the win lines comprise differing numbers of display positions. A corresponding method of gaming is also disclosed.