the difference between an extensive-form game and a simultaneous-move game is that . simultaneous-move games have zero-sum payoffs, but extensive-form games do not in simultaneous-more games players have only two actions to choose from, but in extensive-form games the players can have more than two choices simultaneous-move games have two players, but extensive-form games can have more than two players in extensive-form games the player can observe the other player's action before deciding, but in simultaneous-move they can't