Patent ID: 7967680

Claim:
A non-transitory storage medium having stored thereon a game program executable by a computer of a game apparatus for displaying a virtual game world, in which a player character whose motion is controlled by an input signal from an input device in accordance with an operation performed by a player appears as well as a plurality of objects, as a game image on a display screen, the game program causing the computer to execute: setting a first collision determination area and a second collision determination area moving concurrently with the motion of the player character; detecting a collision of one of the first collision determination area and the second collision determination area against an object among the plurality of objects; each time a collision of the first collision determination area against an object is detected, determining an influence, to be exerted on the object which has collided against the first collision determination area, as being one of a plurality of preset influences at a predetermined probability; each time a collision of the second collision determination area against an object is detected, determining an influence, to be exerted on the object which has collided against the second collision determination area, as being a predetermined influence; and changing a display state of each of the influenced objects to a display state in accordance with the determined influence to be exerted on the object which has collided against the first collision determination area and the determined influence to be exerted on the object which has collided against the second collision determination area, wherein the collision detection includes setting a passing area in which the first collision determination area passes along with the motion of the player character before the motion is started, and determining the influence to be exerted on the object which has collided against the first determination area includes determining the predetermined probability in accordance with the number of objects included in the passing area.