Image-display game system and information storage medium used therefor

An image-display game system which can attract players for a long time to play a game can be implemented by presenting helping data of a0 to a63, and b1 to b5 beneficial in the course of a game to friends, and accordingly communications accompanying therewith can be stimulated and activated thereamong, and the game can be effectively utilized as a communications tool. Such image-display game system is so structured that the players' ID data IDn is communicable or exchangeable therein. With the other player's ID received, items beneficial in the course of the game or the helping data of 10 to 163, and b1 to b5 is generated based on the ID data, and is presented to the player. As a result, exchanging of the ID data IDn is activated among the players. The items presented based on the ID data IDn are determined by operating the ID data using an equation in FIG. 17 which is based on a predetermined rule, or in an operation processing by combining the ID data IDn and a random number R.