Wagering game, gaming machine, networked gaming system and method with stacked wild symbol features

A system, apparatus, and method are disclosed with one or more stacked wild symbols which when appearing, trigger one or more re-spins wherein stacked wild symbols are locked in place for at least one re-spin. Awards are paid following each game outcome. In the event that a portion of a stacked wild symbol is displayed as part of a game outcome, the associated reel may nudge upward or downward to shift the entire stacked wild symbol into view, awards are then paid on the winning outcomes, and one or more re-spins may ensue with any displayed stacked wild symbols being locked for at least one subsequent re-spin.