| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a technology capable of continuation of interest by imparting variation to exchange of items or characters in a video game. SOLUTION: An attribute of the item is changed on the basis of a history of the exchange of the items between game devices. The change of the attribute is executed on the basis of a threshold value of the number of players exchanging the items and is recorded in the exchange history on the basis of a threshold value provided in a time held by the player.</p> |
