Patent ID: 8740698

Claim:
A game system comprising: a first game execution apparatus and a second game execution apparatus which each executes a game in accordance with a game program, the first game execution apparatus having a higher processing power than the second game execution apparatus; and a portable storage medium, wherein the portable storage medium: stores information written by the second game execution apparatus and indicating the processing power of the second game execution apparatus; holds management information for managing use of game software that includes the game program, acquires the game software from the first game execution apparatus and stores the game software; judges whether the game software is permitted to be used in the second game execution apparatus according to the management information, when the game software is requested by the second game execution apparatus; and outputs the game software to the second game execution apparatus, when the portable storage medium judges that the game software is permitted to be used in the second game execution apparatus, wherein the first game execution apparatus: reads the game program and first image data suited for use in the first game execution apparatus from a storage medium having a larger capacity than the portable storage medium; reads the information indicating the processing power of the second game execution apparatus from the portable storage medium; converts the first image data to second image data suited for use in the second game execution apparatus based on the information indicating the processing power of the second game execution apparatus; and outputs the game software that includes the game program and the second image data to the portable storage medium, and wherein the second game execution apparatus: does not include a mechanism for reading data from the storage medium having the larger capacity than the portable storage medium; requests the game software from the portable storage medium; and when acquiring the game software from the portable storage medium, executes a game in accordance with the game program, generates an image from the second image data and displays the generated image in accordance with a progression of the game.