Abstract: The reduction in real operation objects in game systems that use real operation objects is detected. The quantity of real operation objects, which are repeatedly used by being circulated, is detected, it is judged whether the quantity is sufficient or not, and the judging results are output. For example, in a ball throwing game, balls are used in rotation by repeatedly supplying and recovering the balls. The quantity of balls in circulation is detected, and if the quantity is less than a threshold value, the manager of the game system is notified whether a sufficient quantity of balls is being supplied to the player or not, by for example outputting a warning message. By playing with an insufficient quantity of balls the level of difficulty of the game is essentially increased, so the player will feel that this is unfair.

Abstract: In a game device that can be played by a plurality of players at the same time, playing of a game by more than the plurality of players assumed to be playing the game device is prevented. A setting for a number of a plurality of players to participate in the game is received and the game takes place using the set number of the plurality of players. The players constituting the plurality of players participating in the game is then detected during the game. The detected number of the players and the set number of the players are then compared, and the difficulty level of the game is changed when the detected number of players exceeds the set number of players. For example, continuation of the game is made difficult by increasing the difficulty level, and the time for which a cheating can take place is shortened. Further, the game can be made less interesting by lowering the difficulty level, and the time for which a cheating can take place can be made shorter.

Abstract: In a game device that can be played by a plurality of players at the same time, playing of a game by more than the plurality of players assumed to be playing the game device is prevented. A setting for a number of a plurality of players to participate in the game is received and the game takes place using the set number of the plurality of players. The players constituting the plurality of players participating in the game is then detected during the game. The detected number of the players and the set number of the players are then compared, and the difficulty level of the game is changed when the detected number of players exceeds the set number of players. For example, continuation of the game is made difficult by increasing the difficulty level, and the time for which a cheating can take place is shortened. Further, the game can be made less interesting by lowering the difficulty level, and the time for which a cheating can take place can be made shorter.

Abstract: The reduction in real operation objects in game systems that use real operation objects is detected. The quantity of real operation objects, which are repeatedly used by being circulated, is detected, it is judged whether the quantity is sufficient or not, and the judging results are output. For example, in a ball throwing game, balls are used in rotation by repeatedly supplying and recovering the balls. The quantity of balls in circulation is detected, and if the quantity is less than a threshold value, the manager of the game system is notified whether a sufficient quantity of balls is being supplied to the player or not, by for example outputting a warning message. By playing with an insufficient quantity of balls the level of difficulty of the game is essentially increased, so the player will feel that this is unfair.

Abstract: A CPU controls a graphic controller based on control programs within a main RAM to extract a series of rhythm sound data for each of multiple mimic percussion instruments from a graphic RAM and correlates these in a time-axial direction for display on a monitor, instruction and display of the operating timing for each sound of the multiple mimic percussion instruments is performed on the monitor, the player performs sequential striking input with the left and right hands, for example, for the rhythm sounds via a rhythm input detecting apparatus corresponding to multiple mimic percussion instruments, while following the operation timing display instructions thereof. The timing thereof is compared with the timing of the display instruction and evaluation is made based on the offset thereof, and the evaluation results are accumulated. Thus, a rhythm-matching game with a high gaming nature is realized, by inputting operation for multiple instruments using multiple hands and feet such as the left and right hands.

Abstract: A target hitting game machine comprising a main game unit, at least three targets which are arrayed on the left and right sides of the front surface of the main game unit while being located at different height positions on at least one of the left and right sides, each of the targets is movable between a hitting position and a standby position, and a game result evaluating unit for evaluating a game result in accordance with a position of the target, when hit by a player, between the hitting position and the standby position.

Abstract: A drum rhythm game apparatus and a guitar rhythm game apparatus each includes a staging operating unit. Playing progression information, which includes sector numbers, is transferred between the drum rhythm game apparatus and the guitar rhythm game apparatus, thereby enabling staging operation to be implemented from each of the staging operating units while synchronizing the visual staging instructions provided to players of the game for the background music piece to be played at both the drum rhythm game apparatus and the guitar rhythm game apparatus. This allows the game to be played in a state closer to reality in which multiple players each have staging operating units as different instrument, such as with an actual band, making the game more enjoyable.

Abstract: An inverted polygon data memory stores inverted polygon data generated in advance, among models to be considered for reflection on a water surface, of those models whose polygon data are stored in a polygon data memory. Based on an image display graphic command from a CPU, an image display processor processes graphics data and sends image data to a frame buffer. The image display graphic command comprises data generated by a graphics data generator based on the data stored in the inverted polygon data memory and the polygon data memory. An image including models of the inverted polygon data as being reflected on the water surface is displayed in real-time in a three-dimensional game space on a display monitor so as to be quickly movable in response to movement of the viewpoint of a game character that is also displayed in the three-dimensional game space.