A slot machine game feature provides for several types of persistent indicias in a player selection round. One type of persistent indicia can result not only awards an initial credit value when picked, like a regular pick result, but also have a persistent effect in the bonus round which continues to award another randomly-generated credit value in conjunction with each remaining or subsequent pick that the player makes in the bonus. Some versions include cumulative persistent effects, where multiple picks may uncover persistent prize features. Other persistent indicia cause other effects that persist through the player selection round.