1. A game device, which executes a game configured so that a game character performs an action, comprising: determining means for determining whether or not a result of a predetermined action is a predetermined result in a case where the predetermined action is performed by the game character; means for storing information relating to a result of a determination performed in the past by the determining means in a storage; determining/predicting means for executing at least one of a determination as to whether or not the game character has been brought into a situation that allows the predetermined action to be performed by the game character and a prediction as to whether or not the game character will be brought into the situation that allows the predetermined action to be performed by the game character; and producing means for producing a presentation effect relating to the game character based on the result of the determination performed in the past by the determining means, in at least one of a case where it is determined that the game character has been brought into the situation that allows the predetermined action to be performed by the game character and a case where it is predicted that the game character will be brought into the situation that allows the predetermined action to be performed by the game character.