A gaming machine is disclosed that comprises a selector configured to select a plurality of symbols from a set of symbols for display in respective display positions in a display area, and a display position selector configured to select at least one display position. The system also has a function allocator configured to allocate a WILD function to each symbol displayed at a selected display position and to allocate a WILD function to each displayed symbol that is the same as a symbol displayed at a selected display position. An outcome evaluator determines a game outcome based on the displayed symbols and the or each allocated WILD function, and an award allocator allocates an award based on the game outcome determined by the outcome evaluator. A corresponding method is also disclosed.