Patent ID: 7399224

Claim:
A game performing method for executing a game by controlling movements of characters constituting a character group in a game space and by generating an image of the game space, wherein the character group includes a plurality of character groups, the method comprising: setting a plurality of sample points in the game space; calculating positions of the characters after a prescribed time when the characters keep a present moving situation; calculating a time for each character to arrive at the set plurality of sample points from the calculated positions as starting points; drawing out, from the plurality of sample points, sample points to which an arrival time is more than or equal to a reference time for determining a space area for any character in any of the character groups, based on the calculated arrival time, the space area being an area not belonging to a power of any of the character groups in the game space; recognizing the space area in the game space, based on the drawn out sample points; controlling the movements of the characters based on the space area and/or magnitudes of the space area in the game space; and updating the image of the game space.