Apparatus and method for executing game programs having advertisements therein

A game system (18, 20, 22) updates advertisements that are displayed when a game program (M) is executed. The system stores a game program (M) in a memory (24), receives (18) (i.e. downloads), at predetermined times of operation, for example on each new day the game program is executed or each time the game program is executed, updated advertising data that relates to at least one advertisement, stores the received advertising data in the memory (24), executes the game program stored in the memory, and outputs during the execution of the game program display data which corresponds to the stored advertisement data in accordance with the game program code. Instead of downloading new advertisements, plural advertisements may be prestored with the game program and only advertisement selection does are downloaded to update the advertisements that are displayed when the game program is executed.