Wagering game with rule set altered prior to completion of reel spin

A method of playing a wagering game, comprising:

• receiving, via an input device, a wager input from a player for playing the wagering game;
• using one or more controllers for selecting a randomly selected outcome of a plurality of outcomes;
• using at least one of the controllers for moving and stopping a plurality of reels to indicate the randomly selected outcome on a display device;
• using at least one of the controllers for conducting the wagering game in accordance with a basic set of gaming rules;
• selecting, via at least one of the controllers, a modification to the basic set of gaming rules, the modification being selected from a plurality of different types of modifications;
• in response to the wager input and prior to stopping all of the plurality of reels, using at least one of the controllers for indicating the modification after receiving the wager input from the player.

A method of conducting a wagering game on a gaming machine, the method comprising:

• receiving, via an input device, a wager input from a player for conducting the wagering game;
• using one or more controllers for selecting a randomly selected outcome of a plurality of outcomes, the randomly selected outcome being selected in accordance with one or more basic rules of the wagering game;
• displaying on a display device symbols arranged in a symbol array to indicate the randomly selected outcome;
• using at least one of the controllers for determining a modification to at least one of the basic rules, the modification being selected from a plurality of different types of modifications;
• in response to the wager input, using at least one of the controllers for indicating a representation of the modification before all the symbols of the symbol array are displayed;
• and
• using at least one of the controllers for awarding an award in accordance with the modification.