1. A game device, which executes a game that is performed in a virtual environment and that is configured so that a game character performs an action, the game device 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 acquiring, from a storage, information indicating a number of times that the game character has previously performed the predetermined action with the predetermined result; determining/predicting means for executing at least one of a determination during current game play 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 during current game play 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 acquired information, 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, wherein: the producing means controls an intensity of the presentation effect based on the acquired information, when the number of times that the game character has previously performed the predetermined action with the predetermined result is equal to or larger than a first reference number of times, the presentation effect is produced by the producing means, and when the number of times is equal to or larger than the first reference number of times and is smaller than a second reference number of times which is larger than the first reference number of times, the presentation effect is produced by the producing means at a first intensity, and when the number of times is equal to or larger than the second reference number of times, the presentation effect is produced by the producing means at a second intensity that is larger than the first intensity.