Patent ID: 7819732

Claim:
A non-transitory computer-readable information storage medium storing a program controlling a game system which controls placement of objects in a game space and erases at least part of the objects based on a placement pattern of the objects, the program causing a computer to function as: a placement processing section controlling at least one of movement and rotation of the objects based on an operation input of a player and positioning the objects in the game space; a placement pattern determination section determining whether or not the objects positioned in the game space includes objects forming a predetermined placement pattern; an erasing target object setting section setting the objects forming a predetermined placement pattern as erasing target objects; and an erasing processing section performing an erasing process which includes determining whether or not a predetermined condition is satisfied after the erasing target objects have been set, and erasing the erasing target objects from the game space when the predetermined condition is determined not to be satisfied, the placement pattern determination section determining whether or not the objects including additional objects newly positioned in the game space after the erasing target objects have been set include objects forming a predetermined placement pattern, the erasing processing section determining that the predetermined condition is satisfied when the objects forming a predetermined placement pattern are determined to be included, and the erasing processing section determining that the predetermined condition is not satisfied when the objects forming a predetermined placement pattern are determined not to be included.