Abstract:
The present invention provides a game apparatus in which the variation width of a computation result in a battle between a player character and an enemy character is increased, and a difference in result can be brought about even with the same attack by a player&#39;s operation, and furthermore, a player can play a game while he/she feels the sense of realism and tension where he/she manipulates the character that is difficult to manipulate as intended. A chain used by a main character to manipulate a dragon is displayed on a display screen. A player manipulates the dragon by loosening or tightening the chain by performing an operation on a touch panel. The control level of the dragon is represented by an uncontrollability parameter. A status such as the offensive power of the dragon changes according to the uncontrollability parameter.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     The present disclosure relates to subject matter contained in Japanese Patent Application No. 2012-149942, filed on Jul. 3, 2012, the disclosure of which is expressly incorporated herein by reference in its entirety. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a game apparatus in which a game progresses by a player character doing a virtual battle with an enemy character. 
     2. Description of the Related Art 
     Conventionally, a Role-Playing Game (RPG) is enjoyed that progresses by allowing a player character operated by a player to move on a field map to clear various challenges. In the RPG, the player character battles with an enemy character and by the player character winning this battle, the player character gains an experience value, etc., thereby grows up. In the battle between the player character and the enemy character, it is common, for example, to perform a parameter computation based on statuses preowned by the respective characters such as the offensive power of the player character and the defensive power of the enemy character, as a result of which the level of damage received by the enemy character is decided. 
     Meanwhile, in an RPG, the game progresses with a player mainly operating a human model player character. For example, a battle with an enemy character is done by the human model player character and a monster model character cooperating with each other. For example, there is disclosure where when a player character which is a main character wins a battle with an enemy character (monster), the player character catches the enemy character and makes the enemy character as his/her companion (see, for example, JP 2009-240659 A). 
     However, in a conventional game such as an RPG, the result of attack of a player character is decided based on statuses preowned by respective characters such as the offensive power of the player character and the defensive power of an enemy character. Thus, for damage received by the enemy character, a difference in result by a player&#39;s operation does not occur, and the variation width of damage that can be done is not so large, resulting in the lack of sufficient entertainment. 
     In addition, in a game such as that described in JP 2009-240659 A, a monster model subcharacter having become a companion normally obediently follows a player&#39;s instruction or plan. Thus, unless a status abnormality occurs such as going into a panic, the subcharacter does not take disadvantageous action to the player such as attacking the player character. Hence, the game is not such that adventure progresses while the player feels difficulty in manipulating a character such as a monster, and thus, the player does not feel the sense of realism or tension, such as not knowing when the monster goes berserk and launches an attack on the player character. 
     SUMMARY OF THE INVENTION 
     The present invention is made to solve such problems, and an object of the present invention is to provide a game apparatus with a lot of interest in which the variation width of a computation result in a battle between a player character and an enemy character is increased, and a difference in result can be brought about even with the same attack by a player&#39;s operation. 
     In addition, another object of the present invention is to provide a game apparatus with a lot of interest in which adventure can progress while a player feels difficulty in manipulating a character such as a monster, and the player can play a game while he/she feels the sense of realism and tension where he/she manipulates the character that is difficult to manipulate as intended. 
     The present invention relates to a game apparatus comprising a display device and an input device, in which a game progresses by a player character doing a virtual battle with an enemy character, the player character being a subject for operation performed by a player, the game apparatus comprising: a parameter changer that changes a parameter for specifying a status of the player character, according to an operating instruction provided to the input device by the player; a status specifier that specifies the status of the player character, based on the parameter changed by the parameter changer; and a game progresser that allows the game to progress according to the status of the player character specified by the status specifier. 
     By thus changing a parameter for specifying a status of a player character according to an operating instruction provided to the input device by the player, and specifying the status of the player character based on the changed parameter, the status of the player character can be changed like the principle of leverage. As a result, the variation width of a computation result obtained at a battle can be increased. 
     In the present invention, it is preferable that the status specifier specifies the status of the player character, based on a magnitude relation between the parameter and at least one provided predetermined threshold. 
     By thus specifying the status of the player character based on the magnitude relation between the parameter for specifying the status of the player character which changes according to an operating instruction provided to the input device by the player, and a predetermined threshold, the variation width of a computation result obtained at a battle can be increased without performing complex computations. 
     In the present invention, it is preferable that the game apparatus further comprises a parameter displayer that displays the parameter on a display screen of the display device, using a gauge divided into a plurality of zones, wherein the zones divide the gauge at locations corresponding to the predetermined thresholds. 
     By thus displaying the parameter using a gauge divided into a plurality of zones, the player can relatively easily grasp the condition of the status of the player character. 
     In the present invention, it is preferable that the game apparatus further comprises a threshold determiner that determines the predetermined threshold, according to an item owned or carried by the player character or a second player character being a companion of the player character. 
     By thus determining the threshold according to an item owned or carried by the player character, the player can control how to change the status of the player character for when the player inputs an operating instruction for the parameter, therefore the interest of the game can be improved. 
     In the present invention, it is preferable that the game apparatus further comprises a disadvantageous action executer that allows the player character to execute disadvantageous action in terms of progress of the game, when the parameter is larger than a predetermined threshold. 
     By thus allowing the player character to execute disadvantageous action in terms of the progress of the game, such as the player character going into berserk status, resulting in a state in which the player cannot control the player character, when the parameter becomes larger than a predetermined threshold, the player can play the game while having the sense of realism and tension, such as not knowing when a monster that is on the player character&#39;s side goes berserk and launches an attack on the player character. 
     In particular, when a status such as the offensive power of the player character improves as the value of the parameter increases, while the player performs an operation to increase the value of the parameter as much as possible to exploit the player character&#39;s potential to its fullest, there is a need for the player to perform an operation such that the value of the parameter does not become larger than the predetermined threshold, in order to prevent the player character from going berserk. Since the player needs to manipulate the player character with a higher level of strategy, the interest of the game improves. 
     The present invention relates to a tangible computer readable medium that stores a game program that causes a computer apparatus comprising a display device and an input device to execute a game in the computer apparatus, the game progressing by a player character doing a virtual battle with an enemy character, the player character being a subject for operation performed by a player, the game program causing the computer apparatus to function as: a parameter changer that changes a parameter for specifying a status of the player character, according to an operating instruction provided to the input device by the player; a status specifier that specifies the status of the player character, based on the parameter changed by the parameter changer; and a game progresser that allows the game to progress according to the status of the player character specified by the status specifier. 
     The present invention relates to a game progress method performed by a game apparatus comprising a display device and an input device, in which a game progresses by a player character doing a virtual battle with an enemy character, the player character being a subject for operation performed by a player, the game progress method comprising the steps of: changing, by the game apparatus, a parameter for specifying a status of the player character, according to an operating instruction provided to the input device by the player; specifying, by the game apparatus, the status of the player character, based on the changed parameter; and allowing, by the game apparatus, the game to progress according to the specified status of the player character. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an external front view of a game apparatus according to an embodiment of the present invention; 
         FIG. 2  is a block diagram showing a configuration of the game apparatus according to the embodiment of the present invention; 
         FIG. 3  is a diagram showing an example of a display screen of the game apparatus according to the embodiment of the present invention; 
         FIG. 4  is a diagram showing an example of a player character management table set in the game apparatus according to the embodiment of the present invention; 
         FIG. 5  is a diagram showing the relation between a coefficient for calculating offensive power and a controlling condition of a player character in the embodiment of the present invention; 
         FIG. 6  is a diagram showing the relation between items and a controllability parameter display gauge in the embodiment of the present invention; 
         FIG. 7  is a diagram showing a flowchart of an attack process in a virtual battle in the embodiment of the present invention; 
         FIG. 8  is a diagram showing an example of a special skill management table set in the game apparatus according to the embodiment of the present invention; and 
         FIG. 9  is a diagram showing a flowchart of an uncontrollability parameter changing process in the embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     A game apparatus of the present invention will be described. The game apparatus of the present invention is not particularly limited, and a portable terminal such as a smartphone, a mobile phone, or a portable dedicated game machine, a stationary game apparatus, or the like, can be used. In the present embodiment, the case in which a smartphone is adopted as the game apparatus will be described. 
       FIG. 1  is an external front view of a game apparatus according to an embodiment of the present invention. A game apparatus  1  includes a main body  2 , a liquid crystal monitor  3 , an input section  4 , and a speaker  5 . The liquid crystal monitor  3  is provided at the center of the front side of the main body  2  in a substantially rectangular shape. The liquid crystal monitor  3  is of a touch panel type. By touching the surface of the touch panel with a finger or touch pen, the touch location can be detected by a touch input detecting section. A player can allow a game to progress by performing an operation on the touch panel to change an uncontrollability parameter which will be described later. 
     The input section  4  includes menu buttons  4   a , volume buttons  4   b , and a power button  4   c . The menu buttons  4   a  are provided below the liquid crystal monitor  3  of the main body  2 . By pressing the menu buttons  4   a , a menu screen for performing various settings of the game apparatus  1  can be read. The volume buttons  4   b  are provided on an upper part of the side of the main body  2 . Volume can be adjusted by the volume buttons  4   b . The power button  4   c  is provided on the top side of the main body  2 . By pressing the power button  4   c , the power to the game apparatus  1  is switched to ON or OFF or the game apparatus  1  can be switched to sleep state. The speaker  5  is built in to the main body  2 . An output opening of the speaker  5  is provided above the liquid crystal monitor  3  of the main body  2 . 
       FIG. 2  is a block diagram showing a configuration of the game apparatus according to the embodiment of the present invention. The game apparatus  1  includes a CPU (Central Processing Unit)  11 , a RAM (Random Access Memory)  12 , a ROM  13 , an HDD  14 , a sound processing section  15 , a graphic processing section  16 , a touch input detecting section  17 , a communication interface  18 , and an interface section  19 , which are connected to each other by an internal bus. 
     The CPU  11  executes a game program stored in the ROM  13  and performs control of the game apparatus  1 . In addition, the CPU  11  includes an internal timer that keeps time. The RAM  12  is a working area of the CPU  11 . The HDD  14  is a storage area for saving programs and data. 
     The CPU  11  performs a process by reading a program and data necessary for a game to progress from the ROM  13 . The CPU  11  processes the program and data loaded into the RAM  12 , and thereby outputs a sound output instruction to the sound processing section  15  and outputs a rendering command to the graphic processing section  16 . 
     The sound processing section  15  is connected to the speaker  5 . When the CPU  11  outputs a sound output instruction to the sound processing section  15 , the sound processing section  15  outputs a sound signal to the speaker  5 . 
     The graphic processing section  16  is connected to the liquid crystal monitor  3 . When the CPU  11  outputs a rendering command to the graphic processing section  16 , the graphic processing section  16  expands an image in a frame memory (frame buffer)  20  and outputs a video signal for displaying the image on the liquid crystal monitor  3 . The graphic processing section  16  performs rendering of a single image in units of frames. One frame time of an image is, for example, 1/30 second. 
     The input section  4  is connected to the interface section  19 . Input information by the player from the input section  4  and the touch input detecting section  17  is stored in the RAM  12 . The CPU  11  performs various computation processes based on the input information. 
     The communication interface  18  is wirelessly connected to a communication network. In addition, the communication interface  18  wirelessly performs communication with other game apparatuses  1  through a communication unit having an antenna  21  to transmit game information, etc. 
     In the present embodiment, the case will be described in which the present invention is applied to a game in which a human model player character (hereinafter, referred to as the main character) rides on the back of a dragon model player character (hereinafter, referred to as the dragon) and manipulates the dragon using a chain connected to the dragon. The game progresses by the dragon, which is manipulated by the main character, doing a battle with an enemy character. 
       FIG. 3  is an example of a display screen of the game apparatus according to the embodiment of the present invention. On a display screen  3   a  is displayed a scene where a dragon  42  and a main character  43  riding on the back of the dragon  42  are doing a virtual battle with an enemy character  41 , facing the enemy character  41 . A hit point display gauge  44  that displays the physical strength value (hit points) of the player character is displayed on the upper left of the display screen  3   a.    
     In addition, a controllability parameter display gauge  45  that displays the value of a controllability parameter which will be described later is displayed on the upper center of the display screen  3   a . The controllability parameter display gauge  45  is divided into a blue zone  45   a , a green zone  45   b , a yellow zone  45   c , and a red zone  45   d . In the controllability parameter display gauge  45  of  FIG. 3 , the controllability parameter belongs to the green zone  45   b.    
     A chain  46  is displayed on the lower right of the display screen  3   a . The chain  46  represents a chain that is connected to the dragon  42  to manipulate the dragon  42  by the main character  43 . In this game, the player manipulates the dragon  42  by loosening or tightening the chain  46  by performing a flick operation on the touch panel of the liquid crystal panel  3 . The control level of the dragon  42  is represented by an uncontrollability parameter. A status such as the offensive power of the dragon  42  changes according to the uncontrollability parameter. For example, when the chain  46  is loosened by a player&#39;s operation, the value of the uncontrollability parameter increases and thus the offensive power of the dragon  42  gets stronger and approaches berserk status. On the other hand, when the chain  46  is tightened by a player&#39;s operation, the value of the uncontrollability parameter decreases and thus the offensive power of the dragon  42  is weakened and approaches stable status. 
     Various statuses of the dragon  42  are managed by a player character management table which is set in the RAM  12 .  FIG. 4  is an example of the player character management table set in the game apparatus according to the embodiment of the present invention. A player character management table  30  stores a physical strength value (hit points)  31 , a magic power value (magic points)  32 , standard offensive power  33 , defensive power  34 , agility  35 , an uncontrollability parameter  36 , a controlling condition  37 , and a defending flag  38  of the dragon  42 . 
     The standard offensive power  33  of the dragon  42  is a standard value for specifying offensive power for when the dragon  42  does a normal attack on the enemy character  41 . The offensive power is specified by multiplying the standard offensive power  33  by a predetermined coefficient according to the controlling condition  37 . The controlling condition  37  specifies a level at which the player is able to control the dragon  42 . The controlling condition  37  is divided into levels 1 to 4 and is decided based on the uncontrollability parameter  36 . 
     For example, when the uncontrollability parameter  36  is in the range of 1 to 30, the controlling condition  37  is at level 4 which is the highest level. When the uncontrollability parameter  36  is in the range of 30 to 60 (not including 30), the controlling condition  37  is at level 3. When the uncontrollability parameter  36  is in the range of 60 to 90 (not including 60), the controlling condition  37  is at level 2. When the uncontrollability parameter  36  is greater than 90, the controlling condition  37  is at level 1. In this case, the uncontrollability parameters “30”, “60,” and “90” serve as thresholds that divide the controlling condition  37 . 
     The uncontrollability parameter  36  is displayed on the controllability parameter display gauge  45  on the display screen  3   a  of the liquid crystal monitor  3 . The controllability parameter display gauge  45  is divided into a plurality of zones, the blue zone  45   a , the green zone  45   b , the yellow zone  45   c , and the red zone  45   d . Levels 4 to 1 of the controlling condition  37  correspond to the blue zone  45   a , the green zone  45   b , the yellow zone  45   c , and the red zone  45   d , respectively. Therefore, as the value of the uncontrollability parameter  36  increases, the controlling condition  37  changes in order from level 4 to level 1. Note that a special skill that can be used by the dragon  42  is decided according to which level the controlling condition  37  belongs to. 
     When the controlling condition  37  belongs to the blue zone  45   a  (level 4), the offensive power for when the dragon  42  attacks the enemy character  41 , based on which damage to the enemy character  41  is calculated, is the same as the standard offensive power  33 . As shown in  FIG. 5 , the coefficient by which the standard offensive power  33  is multiplied to calculate offensive power is “1”. When the controlling condition  37  is at level 4, a special skill that can be used by the dragon  42  is a healing magic/healing skill that can recover the physical strength value  31  of the dragon  42 , or a support magic/support skill that can improve the defensive power  34  or agility  35  of the dragon  42 . Even if the value of the uncontrollability parameter  36  belongs to the blue zone  45   a , when the value of the uncontrollability parameter  36  increases and exceeds a predetermined threshold, the controlling condition  37  results in belonging to the green zone  45   b.    
     When the controlling condition  37  is in the green zone  45   b  (level 3), the offensive power of the dragon  42  for when the dragon  42  attacks the enemy character  41  is higher than the standard offensive power  33 . Specifically, as shown in  FIG. 5 , the offensive power is calculated by multiplying the standard offensive power  33  by a predetermined coefficient larger than 1. When the controlling condition  37  belongs to the green zone  45   b , a special skill used by the dragon  42  is an attack magic/attack skill for attacking the enemy character  41 . When the controlling condition  37  belongs to the green zone  45   b , a healing magic/healing skill cannot be used. Thus, to use a healing magic or a support magic, there is a need to reduce the uncontrollability parameter  36  of the dragon  42  by performing an operation on the touch panel. Even if the value of the uncontrollability parameter  36  belongs to the green zone  45   b , when the value of the uncontrollability parameter  36  increases and exceeds a predetermined threshold, the controlling condition  37  results in belonging to the yellow zone  45   c.    
     When the controlling condition  37  is in the yellow zone  45   c  (level 2), the offensive power of the dragon  42  for when the dragon  42  attacks the enemy character  41  is higher than the standard offensive power  33  and is still higher than that of the case in which the controlling condition  37  is in the green zone  45   b . Specifically, the offensive power is calculated by multiplying the standard offensive power  33  by a predetermined coefficient larger than 1. Therefore, the value of the coefficient by which the standard offensive power  33  is multiplied is larger in the case of the yellow zone  45   c  than the case of the green zone  45   b.    
     A special skill that can be used by the dragon  42  when the controlling condition  37  is in the yellow zone  45   c  is an attack magic/attack skill for attacking the enemy character  41 . The attack magic/attack skill used when the controlling condition  37  belongs to the yellow zone  45   c  is more powerful than the attack magic/attack skill used when the controlling condition  37  belongs to the green zone  45   b  and thus more damage can be done to the enemy character  41 . Even if the controlling condition  37  is in the yellow zone  45   c , when the value of the uncontrollability parameter  36  increases and exceeds a predetermined threshold, the controlling condition  37  changes to the red zone  45   d.    
     When the uncontrollability parameter  36  exceeds the predetermined threshold, resulting in the controlling condition  37  belonging to the red zone  45   d , the dragon  42  goes into berserk status and thus cannot be controlled by a player&#39;s operation on the touch panel. For example, the dragon  42  takes disadvantageous action in terms of the progress of the game, such as going berserk and attacking the main character  43 . In this case, the game may be configured such that the dragon  42  attacks the main character  43 , going into a state in which the dragon  42  and the main character  43  cannot battle, leading to game over. 
     Alternatively, when the dragon  42  goes berserk, instead of attacking the main character  43 , the dragon  42  may attack the enemy character  41 , but at the same time some kind of penalty may be imposed. For example, when the uncontrollability parameter  36  exceeds the predetermined threshold, resulting in the controlling condition  37  belonging to the red zone  45   d , the game may be configured such that the standard offensive power  33  is multiplied by a predetermined coefficient larger than 1, by which more powerful offensive power than that of the case of belonging to the green zone  45   b  or the yellow zone  45   c  can be obtained, but every time the dragon  42  does an attack, the maximum HP of the dragon  42  decreases. In this case, the player can increase the offensive power of the dragon  42  and thus can give more damage to the enemy character  41  by increasing the uncontrollability parameter  36  to make the controlling condition  37  belong to the red zone  45   d ; however, the maximum HP decreases and thus it is disadvantageous in terms of the progress of the game. 
     When the controlling condition  37  is in the red zone  45   d  and thus the dragon  42  goes into berserk status, those zones displayed as the yellow zone  45   c  and the green zone  45   b  so far on the controllability parameter display gauge  45  are displayed also changed to the red zone  45   d . Hence, once the uncontrollability parameter  36  has become larger than the predetermined threshold at which the uncontrollability parameter  36  goes into the red zone  45   d  and the controlling condition  37  has belonged to the red zone  45   d , those zones displayed as the yellow zone  45   c  and the green zone  45   b  turn into the red zone  45   d , and thus, the controllability parameter display gauge  45  only has the blue zone  45   a  and the red zone  45   d.    
     In this case, to bring the dragon  42  back to normal stable status from berserk status, there is a need to move the value of the uncontrollability parameter  36  to the blue zone  45   a  by further reducing the uncontrollability parameter  36  than those in the zones displayed as the yellow zone  45   c  and the green zone  45   b  so far. That is, once the dragon  42  has gone into berserk status, it takes time to bring the dragon  42  back to normal status. As such, after once the dragon  42  has gone into berserk status, by reducing the value of the uncontrollability parameter  36 , the portions of the yellow zone  45   c  and the green zone  45   b  that are changed to the red zone  45   d  return to their original states again. 
     The uncontrollability parameter  36  can be increased or reduced by a player&#39;s operation. For example, in the case of performing an input for the uncontrollability parameter  36  on the touch panel, when a flick operation is performed from the right to the left the uncontrollability parameter  36  increases, and when a flick operation is performed from the left to the right the uncontrollability parameter  36  decreases. 
     In addition, the uncontrollability parameter  36  can be changed by other elements than a player&#39;s operation on the touch panel. For example, the configuration may be such that the uncontrollability parameter  36  increases automatically as time passes, or such that every time the dragon  42  succeeds in attacking the enemy character  41  or every time the dragon  42  is attacked by the enemy character  41 , the uncontrollability parameter  36  increases. 
     In the game apparatus of the present invention, the controllability parameter display gauge  45  is divided into the blue zone  45   a , the green zone  45   b , the yellow zone  45   c , and the red zone  45   d . Every time the value of the uncontrollability parameter  36  exceeds a threshold set for each zone, a status such as the offensive power of the player character changes and thus a magic or skill that can be used also changes. The thresholds that divide the controllability parameter display gauge  45  into the respective zones may be fixed, but can also be determined according to, for example, the level of the player character (the dragon  42  or the main character  43 ) or the item owned or carried by the player character. 
     Therefore, the division of the controllability parameter display gauge  45  is decided according to the owned or carried item, e.g., when the player character owns or carries item A, as shown in  FIG. 6 , the blue zone  45   a  is the longest and the green zone  45   b  and the yellow zone  45   c  are short, and when the player character owns or carries item B, the blue zone  45   a  and the yellow zone  45   c  are short and the green zone  45   b  is long. When the player character owns or carries item C, the controllability parameter display gauge  45  may only include the blue zone  45   a , the yellow zone  45   c , and the red zone  45   d  without the green zone  45   b . Although the length of the gauge where all zones are put together is normally fixed, the configuration may be such that the length of the controllability parameter display gauge  45  changes according to the level of the player character or the item owned or carried by the player character. 
     Next, a process performed when a player character takes action in a virtual battle, e.g., the player character attacks an enemy character or defends itself against the enemy character, will be described.  FIG. 7  is a diagram showing a flowchart of an attack process in a virtual battle on the game apparatus according to the embodiment of the present invention. A virtual battle between a player character and an enemy character begins when the player character and the enemy character run into each other on a field map. The virtual battle is turn-based. Each of the player character and the enemy character can take any of actions including a normal attack, defense, a special skill, and use of an item, a predetermined number of times per turn. A decision as to in what order the player character and the enemy character do attacks in each turn is made based on the agility  35  of each character. 
     When the attack turn of the player character starts (step S 11 ), an uncontrollability parameter  36  for when the attack turn of the player character starts is specified (step S 12 ). Then, the action contents of the player character are decided based on the uncontrollability parameter  36  or a controlling condition  37  (step S 13 ). 
     Which one of the actions including a normal attack, defense, a special skill, and use of an item the player character takes is automatically specified according to a predetermined probability. In this case, the predetermined probability may change according to the value of the uncontrollability parameter  36 . For example, when the controllability parameter display gauge  45  belongs to the blue zone  45   a , the normal attack is 50%, the defense is 25%, the special skill is 15%, and the use of an item is 10%, and when the controllability parameter display gauge  45  belongs to the green zone  45   b , the normal attack is 55%, the defense is 15%, the special skill is 20%, and the use of an item is 10%. Alternatively, instead of automatically specifying the action contents of the player character, the player may select action contents. 
     When the action contents of the player character are decided to be “normal attack” (step S 101 ), whether the normal attack of the player character hits the enemy character is decided randomly based on the agility  35  of the player character, the agility of the enemy character, the evasion ratio of the enemy character, etc. (step S 102 ). If it is decided that the normal attack of the player character does not hit the enemy character (NO at step S 102 ), then the attack process for this attack turn ends. 
     If it is decided that the nor mal attack of the player character hits the enemy character (YES at step S 102 ), then the offensive power of the player character is decided based on the coefficient associated with the controlling condition  37  and the standard offensive power  33  (step S 103 ). The offensive power of the player character is specified by multiplying the standard offensive power  33  of the player character by a predetermined coefficient. The predetermined coefficient changes according to the controlling condition  37  of the player character. As shown in  FIG. 5 , when the uncontrollability parameter  36  belongs to the blue zone  45   a , the coefficient by which the standard offensive power  33  is multiplied is “1”. The value of the coefficient becomes larger than “1” in the order of the green zone  45   b , the yellow zone  45   c , and the red zone  45   d.    
     When the offensive power of the player character is decided at step S 103 , the level of damage received by the enemy character is calculated (step S 104 ). The damage received by the enemy character is decided randomly based on the offensive power of the player character and the defensive power of the enemy character. When the damage received by the enemy character is decided, the physical strength value of the enemy character stored in a table which manages the enemy character is updated (step S 105 ), and the process for this attack turn ends. 
     When the action contents of the player character are decided to be “defense” (step S 111 ), a defending flag  38  is set in a player character management table  30  which manages the player character (step S 112 ), and the process for this attack turn ends. Note that when the player character is attacked by the enemy character while the defending flag  38  is set, the damage received by the player character is halved. Note that the set defending flag  38  is reset at the point in time when all of the actions of the player character and the enemy character in this turn are done. 
     When the action contents of the player character are decided to be “special skill” (step S 121 ), the contents of a special skill  51  to be executed are decided referring to a special skill management table  50  set in the RAM  12 , such as that shown in  FIG. 8  (step S 122 ). 
     In the special skill management table  50 , usable special skills  51  are set for each zone to which the uncontrollability parameter  36  belongs, i.e., for each controlling condition  37 . When the uncontrollability parameter  36  belongs to the blue zone  45   a , “healing magic  1 ” can be used, and when belonging to the green zone  45   b , “special attack  1 ” can be used. The special skills  51  stored in the special skill management table  50  can also be set beforehand by the player on a menu screen, etc. For example, when the controlling condition  37  is in the blue zone  45   a , a healing magic and a support magic can be set, and furthermore, the player can select which one of the healing magic and the support magic to set. 
     According to the contents of the special skill  51  decided at step S 122 , the effect thereof is calculated (e.g., in the case of the healing magic the amount of recovery of the physical strength value of the player character is calculated, and in the case of the attack magic the level of damage received by the enemy character is calculated) (step S 123 ). When the effect of the special skill  51  is calculated, a status such as the physical strength value of the player character or the enemy character is updated by addition or subtraction according to the effect of the special skill  51  (step S 124 ), and the process for this attack turn ends. 
     When the action contents of the player character are decided to be “use of an item” (step S 131 ), the effect according to the used item is calculated (step S 132 ). Then, according to the effect of the item, a status such as the physical strength value or magic power value of the player character or the enemy character is updated (step S 133 ), and the process for this attack turn ends. 
     Every time an attack turn of the player character comes around, a series of these attack processes are performed and continue until the physical strength value  31  of the player character reaches zero, going into a state in which the player character cannot battle, or until the physical strength value of the enemy character reaches zero, going into a state in which the enemy character cannot battle, or until either the player character or the enemy character runs away and withdraws from the battle. 
     Next, the changing process of an uncontrollability parameter  36  will be described.  FIG. 9  is a diagram showing a flowchart of an uncontrollability parameter changing process which is performed by the game apparatus according to the embodiment of the present invention. First, by a player&#39;s operation on the touch panel, a changing input for an uncontrollability parameter  36  is accepted (step S 21 ), and the uncontrollability parameter  36  is changed (step S 22 ). 
     For example, in the case in which the longitudinal direction of the touch panel is a horizontal direction and the transverse direction is a vertical direction, when a flick operation is performed on the touch panel in the right direction from the left side, the uncontrollability parameter  36  increases and thus the player character becomes more offensive, resulting in a state in which the player character is difficult to control. When a flick operation is performed on the touch panel in the left direction from the right side, the uncontrollability parameter  36  decreases and thus the player character becomes more defensive, resulting in a state in which the player character is easy to control. 
     For example, in a game in which the dragon  42  serving as a player character is connected by the chain  46  and is allowed to battle with the enemy character  41 , when a flick operation is performed on the touch panel in the right direction from the left side, the chain  46  is loosened and thus the dragon  42  becomes offensive, approaching berserk status. On the other hand, when a flick operation is performed on the touch panel in the left direction from the right side, the chain  46  is tightened and thus the dragon  42  becomes defensive, going into stable status. Note that the amount of change in uncontrollability parameter  36  is determined according to the movement distance in the left/right direction where a finger or the like moves while touching the touch panel during a flick operation. 
     If the uncontrollability parameter  36  is changed and reaches a threshold at which a controlling condition  37  changes (YES at step S 23 ), then the status of the controlling condition in a player character management table is updated (step S 24 ), and the changing process of the uncontrollability parameter  36  ends. If the uncontrollability parameter  36  does not reach the threshold (NO at step S 23 ), then the series of processes end without changing the controlling condition  37 . These processes are performed on a frame-by-frame basis until a virtual battle between the player character and the enemy character ends. 
     Although in the above-described embodiment the case is described in which the offensive power of the player character is decided according to the change in uncontrollability parameter, the configuration may be such that an increase in uncontrollability parameter not only increases offensive power but also changes defensive power, agility, etc., at the same time. For example, the configuration may be such that when the player character approaches berserk status by an increase in uncontrollability parameter, the offensive power increases but the defensive power decreases, increasing damage to be done to the enemy character; on the other hand, the risk of an increase in damage to be received by the player character also occurs. By such a configuration, the player needs to progress the game by strategically operating the controlling condition of the player character, which improves the interest of the game. 
     In addition, the configuration may be such that other statuses than offensive power such as the defensive power and agility of the player character are decided according to the change in uncontrollability parameter. For example, the configuration may be such that as the player character approaches berserk status, the speed of the player character increases, but the moving direction cannot be controlled. 
     In addition, the types of status influenced by the change in uncontrollability parameter can be changed according to the type of player character. For example, when the player character is a giant model monster characterized by the level of strength, the offensive power changes according to the change in uncontrollability parameter. When the player character is a bird model monster characterized by agility, the agility changes according to the change in uncontrollability parameter. 
     Although in the above-described embodiment the application of the present invention to an RPG is mainly described, the present invention can be applied to games of other genres than the RPG. For example, the present invention can also be applied to action games, racing games, etc. For example, in the case of a racing game, a human model character rides on an ostrich model character and the player manipulates the ostrich model character. By reducing an uncontrollability parameter by a player&#39;s operation, although the speed of the ostrich model character decreases, the moving direction obediently follows the player&#39;s operation. By increasing the uncontrollability parameter, although the speed of the ostrich model character increases, the moving direction is difficult to follow the player&#39;s operation. 
     REFERENCE SIGNS LIST 
     
         
           1  GAME APPARATUS 
           2  MAIN BODY 
           3  LIQUID CRYSTAL MONITOR 
           4  INPUT SECTION 
           5  SPEAKER 
           11  CPU 
           12  RAM 
           13  ROM 
           14  HDD 
           15  SOUND PROCESSING SECTION 
           16  GRAPHIC PROCESSING SECTION 
           17  TOUCH INPUT DETECTING SECTION 
           18  COMMUNICATION INTERFACE 
           19  INTERFACE SECTION 
           20  FRAME MEMORY 
           21  ANTENNA 
           30  PLAYER CHARACTER MANAGEMENT TABLE 
           50  SPECIAL SKILL MANAGEMENT TABLE