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.