GAME SYSTEM AND INFORMATION STORAGE MEDIUM

PROBLEM TO BE SOLVED: To provide a game system and an information storage medium capable of controlling arrangement with a low processing load when a predetermined object moves according to another object. SOLUTION: This game system forms an image. A master-slave relationship processing part 114 sets/releases a master-slave relationship designating one of first and second objects as a master object and the other as a slave object. As to the slave object having the master object, relative arrangement information to the master object is converted into absolute arrangement information before image formation. In a movement/action computing part 112, movement/ action processing for the slave object having the master object is carried out by using the relative arrangement information to the master object, and for the object having no master object, movement/action processing is carried out by using the absolute arrangement information.