Gaming devices, gaming systems, methods of conducting a wagering game, and computer programs for initiating a wagering game are presented herein. One concept of the present disclosure is directed to earning bonus features through play of multiple games in series or in parallel. A wagering game includes a base game and a bonus game. A number of base games are conducted in series or in parallel. For each of the conducted base games, one or more bonus-game-modifiers are added to a feature pool (e.g., a queue) in response to a predetermined event (e.g., a winning outcome) occurring in that base game. In response to a triggering event (e.g., filling the feature pool, a symbol-based trigger in the current base game, etc.), the bonus game is conducted as modified by the bonus-game-modifiers in the feature pool.