Gaming machine

Abstract

A main display, a sub-display, and a main CPU are provided in a gaming machine. The main display includes a plurality of display areas on which a plurality of strung symbols are variably displayed. The main CPU decides stopping symbols to be stopped on the display areas, and determines whether or not a transition condition for shifting a gaming mode from a base game to a bonus game is established. The main CPU decides game contents in the bonus game. The main CPU displays the decided game contents on the sub-display, thereby notifying a player of the game contents, and updates displayed game contents displayed on the sub-display to become advantageous for the player when the game contents are displayed thereon.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

This application is based upon the prior Japanese Patent Application No. 2004-216393, filed on Jul. 23, 2004, the entire contents of which are incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a gaming machine such as a slot machine on which symbols arrayed on a plurality of columns are variably displayed.

2. Description of the Related Art

Heretofore, a slot machine has been known as a gaming machine which pays out media such as medals and coins (hereinafter, referred to as “coins”) for use in a game in response to contents of winning. The slot machine includes the one which displays a plurality of reels (image-type reels, video-type reels) on a display in a pseudo manner, as well as the one which has a plurality of reels (mechanical reels) in which symbols are attached onto outer circumferential surfaces.

In the slot machine having the image-type reels, when a player performs a predetermined operation, the respective reels on the display start to scroll, and the symbols arrayed in a predetermined order are displayed circularly. Then, when all the reels are stopped, coins corresponding to a combination of the symbols on an activated line (payline) at that time are paid out. Such a slot machine is described in Japanese Patent Laid-Open Publication No. 2004-57221 and No. 2003-180908.

In the slot machine described in the foregoing patent documents, a bonus game (special gaming mode) in which a predetermined number of free games are played is prepared separately from a base game (base gaming mode). When a transition is made from the base game to the bonus game, before the first free game is started, a number-of-free-games decision game is played, which decides the number of free games and payout odds of the free games. For the number-of-free-games decision game, a rotation disc is used, in which a plurality of “number of times” areas (or “odds” areas) are arranged in random order. The number of times of the free games and the payout odds thereof are decided based on a spot indicated by an index when the rotation disc is stopped.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a gaming machine in which an entertainment factor is increased.

In order to achieve the foregoing object, in an aspect of the present invention, the gaming machine according to the present invention is summarized to be a gaming machine, which includes a display and a processor. The display includes a plurality of display areas on which a plurality of symbols are variably displayed and stopped. The processor is configured to control the display, decide a symbol combination to be stopped on the display areas, determine whether or not a transition condition for shifting a game from a base game to a bonus game is established based on the symbol combination, decide a game content in the bonus game if the transition condition is established, and notify a player of the game content updating so as to become advantageous step by step for the player.

In another aspect of the present invention, the gaming machine according to the present invention is summarized to be a gaming machine including: a base game operable upon a bet made by a player; a bonus game initiated upon the occurrence of a triggering event in the base game; a display adapted to display the base game and the bonus game; and a processor in communication with the display, wherein the processor is operable to (a) determine a game content in the bonus game, (b) when a game shifts from the base game, display the game content updating on the display so as to become advantageous step by step for the player.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exterior perspective view showing a slot machine according to an embodiment of the present invention.

FIG. 2 is a view showing a button arrangement of a control panel according to the embodiment of the present invention.

FIG. 3 is a block diagram mainly showing a configuration of an inside of the slot machine according to the embodiment of the present invention.

FIG. 4 is a block diagram showing an example of an internal configuration of an image control circuit according to the embodiment of the present invention.

FIG. 5 is a view showing a display screen of a main display according to the embodiment of the present invention.

FIG. 6 is a view showing an array table of the respective display areas of the slot machine according to the embodiment of the present invention.

FIG. 7 is a view showing a display screen of a sub-display according to the embodiment of the present invention.

FIG. 8 is a flowchart showing a game progress of the slot machine according to the embodiment of the present invention.

FIG. 9 is a view showing a classification table for use in deciding contents of bonus games according to the embodiment of the present invention.

FIGS. 10A to 10C are views showing situations where the display screen of the sub-display is being varied according to the embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

A description will be made of a gaming machine according to the present invention based on an embodiment with reference to the accompanying drawings. Note that the same reference numerals will be assigned to the same or equivalent constituents, and when descriptions are repeated, such repeated descriptions will be omitted.

FIG. 1 is a perspective view entirely showing a slot machine as a gaming machine according to the embodiment of the present invention. The slot machine 1 includes a cabinet 2. On the cabinet 2, a main display (display unit) 3 for digitally displaying a slot game is provided. The main display 3 is a display device including a translucent touch panel (input unit) 3a. A player contacts the touch panel 3a, and the slot machine 1 thus receives a variety of input commands.

A sub-display (display unit) 4 is provided above the main display 3. On the sub-display 4, an image for explaining contents of the game and an image for playing a bonus game contents decision game to be described later are displayed. A control panel 5 is provided below the main display 3. The control panel 5 is substantially similar to that provided on a publicly known slot machine. Six buttons 5a to 5f as shown in FIG. 2 are provided on the control panel 5.

As shown in FIG. 2, on an upper left of the control panel 5, there is provided a coin payout button (PAYOUT COINS) 5a which instructs a payout of media, such as medals and coins, acquired in the game. On a lower right of the control panel 5, a start button (START) 5f which instructs a start of the game is provided. Remaining four buttons are arrayed laterally in the vicinity of an approximate center of the control panel 5. These four buttons are a collect button (COLLECT) 5b, a max-bet button (MAX BET) 5c, a 1-bet button (1 BET) 5d, and a repeat-bet button (REPEAT BET) 5e in order from the left side.

The collect button 5b is a button for use in a gamble game (for example, a game in which the number of acquired coins becomes double) which the player can challenge only in the case of having acquired the coins. In addition, the collect button 5b is a button for determining coins acquired in the gamble game concerned. Each of the max-bet button 5c, the 1-bet button 5d, and the repeat-bet button 5e is a button for deciding the number of bet coins. By using the max-bet button 5c, the maximum number of coins that can be bet are bet. By using the 1-bet button 5d, one coin is bet. By using the repeat-bet button 5e, the same number of coins as those in a previous game are bet.

Returning to FIG. 1, a coin insertion portion 6 into which the coins are inserted is provided below the main display 3. A bill insertion portion may also be provided instead of or in addition to the coin insertion portion 6, and the slot game may be thus played by a bill. A coin receiving portion 7 for allowing the player to receive the paid-out coins is provided in a lower portion of the cabinet 2. A pair of speakers 8L and 8R are provided on both right and left sides of the sub-display 4.

FIG. 3 is a block diagram showing an internal configuration of the slot machine 1. As shown in FIG. 3, the slot machine 1 includes a plurality of constituents while taking a microcomputer 31 as a main constituent.

The microcomputer 31 includes a main central processing unit (CPU) 32 as a controller of the slot machine 1, a random access memory (RAM) 33, and a read only memory (ROM) 34.

The main CPU 32 operates according to programs stored in the ROM 34. The main CPU 32 receives signals from the touch panel 3a of the main display 3 and the respective buttons 5a to 5f of the control panel 5 through an input-output (I/O) port 39. Meanwhile, the main CPU 32 transfers signals with the other constituents through the I/O port 39. In such a way, the main CPU 32 performs an operation control for the entire slot machine 1. The RAM 33 stores data and programs for use when the main CPU 32 operates. For example, after the game is started, the RAM 33 temporarily stores random number values sampled by a sampling circuit 36 to be described later. The ROM 34 stores programs executed by the main CPU 32, and permanent data.

The slot machine 1 includes a random number generator 35, a sampling circuit 36, a clock pulse generating circuit 37, and a frequency divider 38. The random number generator 35 operates according to an instruction of the main CPU 32, and generates random numbers within a certain range. The sampling circuit 36 samples, according to an instruction of the CPU 32, an arbitrary random number from the random numbers generated by the random number generator 35, and inputs the sampled random number to the main CPU 32. The clock pulse generating circuit 37 generates a reference clock for operating the main CPU 32, and the frequency divider 38 inputs signals formed by dividing the reference clock by a certain cycle to the main CPU 32.

The slot machine 1 includes a lamp driving circuit 59, a lamp 60, an LED driving circuit 61, an LED 62, a hopper driving circuit 63, a hopper 64, a payout complete signal circuit 65, and a coin detecting unit 66. The slot machine 1 includes an image control circuit 71 which performs a control process for images displayed on the main display 3 and the sub-display 4, and a sound control circuit 72 which controls sounds generated from the speakers 8L and 8R.

The lamp driving circuit 59 outputs, to the lamp 60, a signal for turning on the lamp 60, and blinks the lamp 60 while the game is being executed. By such a blink, an effect of the game is performed. The LED driving circuit 61 controls a blinking display of the LED 62. The LED 62 displays the number of credits, the number of acquired coins, and the like. The hopper driving circuit 63 drives the hopper 64 according to a control of the main CPU 32. The hopper 64 performs an operation for paying out the coins, and pays out the coins from the coin receiving portion 7.

The coin detecting unit 66 measures the number of coins paid out by the hopper 64, and notifies the payout complete signal circuit 65 of data regarding a value of the measured number of coins. The payout complete signal circuit 65 receives the data regarding the value of the number of coins from the coin detecting unit 66, and inputs a signal issuing a notice that the payout of the coins is completed to the main CPU 32 when the value of the number concerned reaches preset data of the number concerned.

The image control circuit 71 controls individual image displays on the main display 3 and the sub-display 4, and displays a variety of images such as symbol images to be described later on the main display 3 and the sub-display 4.

As shown in FIG. 4, the image control circuit 71 includes an image control CPU 71a, a work RAM 71b, a program ROM 71c, an image ROM 71d, a video RAM 71e, and a video display processor (VDP) 71f. The image control CPU 71a decides the images (symbol images and the like) to be displayed on the main display 3 and the sub-display 4 according to an image control program prestored in the program ROM 71c based on a parameter set in the microcomputer 31. The work RAM 71b is composed as a temporal storage unit when the image control CPU 71a executes the image control program.

The program ROM 71c stores the image control program, a variety of selection tables, and the like. The image ROM 71d stores dot data for forming the images. In the embodiment of the present invention, data of various symbol images (hereinafter, referred to as a “symbol image group”) is included in the dot data. The video RAM 71e is composed as a temporal storage unit when the images are formed by the VDP 71f. The VDP 71f includes a control RAM 71g, forms the images corresponding to the display contents of the main display 3 and the sub-display 4, which are decided by the image control CPU 71a, and outputs the respective formed images to the main display 3 and the sub-display 4.

FIG. 5 is a view showing a display screen of the main display 3. In the embodiment of the present invention, a display area portion 81, a payline display portion 82, an upper display portion 83, and a lower display portion 84 are displayed on the main display 3.

On the display area portion 81, display areas 3A to 3I on which symbols are to be displayed are provided in a 3×3 matrix fashion. On the display areas 3A to 3I, reel images on which a plurality of types of the symbols are drawn are variably displayed so as to be rotationally displayed. The reel images are subjected to an image process so that selected images can be displayed on approximate centers of the display areas 3A to 3I when the respective reel images are stopped.

On a region including a left side and upper side of the display area portion 81, there is provided the payline display portion 82 including number-of-bets display portions 82a which display the number of bets bet on the respective activated lines (paylines) L1 to LB of the game. In the slot machine 1, the number of paylines is eight, and the paylines are paylines L1, L2 and L3 extended in the lateral direction, paylines L4, L5 and L6 extended in the longitudinal direction, and paylines L7 and L8 extended in a diagonal direction. When a predetermined combination of the symbols is arrayed on any of the paylines L1 to L8, a payout corresponding to contents of the combination of the symbols is paid to the player.

The upper display portion 83 is provided above the display area portion 81 and the payline display portion 82. The upper display portion 83 is composed of a name and logotype of the slot machine 1, a mark in which how to play the game concerned is designed, and the like. The lower display portion 84 is provided below the display area portion 81. The lower display portion 84 is composed of a number-of-bets (BET) display portion 84a, a number-of-acquired-coins (PAID) display portion 84b, a character information display portion 84c, and a number-of-credits (CREDITS) display portion 84d.

The number of coins bet per game is displayed on the number-of-bets display portion 84a. The number of coins acquired per game is displayed on the number-of-acquired-coins display portion 84b. On the character information display portion 84c, character information indicating a current gaming state is displayed, and for example, when the current gaming state shifts to a bonus gaming state, character information notifying the player of such shift is displayed. The number of coins currently credited is displayed on the number-of-credits display portion 84d.

The symbols displayed on the respective display areas 3A to 3I of the display area portion 81 and the arrays thereof are as shown in an array table of FIG. 6. 32 symbols arrayed in a predetermined order are scroll-displayed circularly on each of the display areas 3A to 3I, and these symbols are recognized by the player as if being varied by rotation of a mechanical reel. The array of the symbols displayed on the display area 3E (hereinafter, referred to as a center reel) located on the center of the display area portion 81 is different from the arrays of the symbols displayed on the other display areas 3A, 3B, 3C, 3D, 3F, 3G, 3H and 3I (hereinafter, referred to as peripheral reels).

In the array table shown in FIG. 6, joker symbols T1 located at a code number 0 are special symbols that can be treated as any of the other symbols, and are so-called almighty symbols.

In the slot machine 1, a base game (base gaming mode) and a bonus game (special gaming mode) are prepared in a progress of the game. The main CPU 32 of the microcomputer 31 performs a winning determination as to whether or not a transition condition (a triggering event) to the bonus game is satisfied. When such a bonus game transition condition is satisfied, the gaming state is shifted from the base game to the bonus game. In the embodiment of the present invention, the transition condition to the bonus game is that the joker symbol T1 is stopped on the center reel 3E.

When it is determined by the main CPU 32 that the bonus game transition condition is satisfied, the gaming state of the slot machine 1 shifts to the bonus gaming state, and a predetermined number of free games are played as the bonus game.

When the gaming state shifts to the bonus gaming state, the player can play the games without inserting the coins or depressing the bet buttons 5c to 5e. Hence, during the bonus game, the player can receive the payout of the coins without consuming the owned coins and credits, and can acquire an extremely advantageous position in terms of the acquisition of the coins.

Although details will be described later, in the slot machine 1 according to the embodiment of the present invention, the number of paid-out coins corresponding to the combination established during the bonus game is changed by a predetermined multiplying factor. Accordingly, when the multiplying factor is increased, the player can acquire more coins at the time of the bonus game. During the bonus game, the joker symbol T1 stopped on the center reel 3E when the gaming state shifts to the bonus game turns to a state of being fixed to the center reel 3E as it is, and the player can acquire the coins in a more advantageous state.

Hence, the player will play the base game while expecting that the gaming state will shift to the bonus game described above.

FIG. 7 is a view showing a display screen of the sub-display 4. On the sub-display 4, there are displayed a character effect portion 85, a number-of-free-games display portion 86, and a payout odds display portion 87 in the case of a free game contents decision game played when the gaming state shifts to the bonus game.

On the character effect portion 85, two characters are displayed, and an effect of a battle scene between the characters is made. On the number-of-free-games display portion 86 disposed on the left side of the character effect portion 85, the number of free games played after the gaming state shifts to the bonus game is displayed. On the payout odds display portion 87 disposed on the right side of the character effect portion 85, a value of the multiplying factor (multiplier) by which the number of regularly paid-out coins is multiplied in each free game after the gaming state shifts to the bonus game is displayed. The multiplier and the number of free games are activated during the bonus game.

A description will be made of a control method of the slot machine 1 according to the embodiment of the present invention. FIG. 8 is a flowchart showing the game progress of the slot machine 1. In FIG. 8, steps are abbreviated as S.

In the slot machine 1, when a main process is started as shown in FIG. 8, a start receiving process is performed in S1 according to the control of the main CPU 32 at the start of the game. More specifically, the main CPU 32 accesses the ROM 34, and transfers, to the image control circuit 71, information regarding a basic screen, such as a frame displayed on the main display 3. In addition, the image control circuit 71 displays the received information on the main display 3 after temporarily storing the information in the RAM 71e. Thus, the slot machine 1 turns to a state where the player can play the slot game. The following processes are performed in such a manner that the main CPU 32 processes information regarding the slot game in the programs stored in the ROM 34 and the RAM 33. When the slot machine 1 is activated, the slot machine 1 is in a state where the base game is played as the slot game.

In S1, a bet by the player is awaited, and the game is started when the coins of a number equivalent to the bet for one game is inserted from the coin insertion portion 6 or when one of the bet buttons 5c to 5e is depressed in the case where the credits remain. Thus, the start receiving process is completed.

When the start receiving process is ended, the main CPU 32 performs a lottery process in S2. In the lottery process, the main CPU 32 operates as a stopping symbol decision unit, and decides the symbols (stopping symbols) to be displayed on the respective display areas 3A to 3I of the main display 3. The random number values sent from the sampling circuit 36 to the main CPU 32 are used for deciding the stopping symbols. In S2, the main CPU 32 operates as a determination unit, and determines whether or not the bonus game transition condition is satisfied based on the stopping symbols on the respective display areas 3A to 3I. Specifically, in the embodiment of the present invention, when the joker symbol T1 is drawn by lottery as the stopping symbol on the center reel 3E, it is determined that the bonus game transition condition is established.

Next, in S3, the symbols displayed on the respective display areas 3A to 3I of the main display 3 are scrolled, and a base game process is performed while leaving the gaming mode as the base gaming mode. The main CPU 32 controls the image control circuit 71, and performs the image process as if the mechanical reels were being rotated.

In S4 subsequent to S3, the stopping symbols are displayed on the respective display areas 3A to 3I of the main display 3 based on a result of the lottery process in S2. In addition, when the bonus game transition condition is established, the main CPU 32 proceeds to S5, and otherwise, the main CPU 32 ends the main process. When proceeding to S5, the main CPU 32 shifts the gaming mode from the base gaming mode to the special gaming mode, and performs a bonus game process. Specifically, the symbols are repeatedly scrolled without inserting the coins or depressing the bet buttons 5c to 5e. Thereafter, the main process is ended.

When the bonus game transition condition is established in S2 described above, the main CPU 32 operates as a game contents decision unit, and decides the contents of the bonus game. The contents of the bonus game are the number of free games played during the bonus game and payout odds thereof during the free games. When the gaming state is shifted to the bonus game, the main CPU 32 operates as a game contents notification unit. The main CPU 32 displays the decided contents of the bonus game on the sub-display 4, and executes the bonus game process of S5 according to the contents of the bonus game. It is not always necessary to decide, in S2, the contents of the bonus game by the main CPU 32. The contents of the bonus game may also be decided at arbitrary timing during a period from the establishment of the bonus game transition condition to the start of the bonus game.

As in the decision of the stopping symbols, for the decision of the contents of the bonus game, the random number values sent from the sampling circuit 36 to the main CPU 32 are used. By using the random number values concerned and a classification table as shown in FIG. 9, the main CPU 32 decides the number of free games and a value (final value) of the payout odds thereof. For example, when the random number value for deciding the number of free games is 80, and the random number value for deciding the payout odds thereof is 115, ten free game is played as the bonus game, and the payout in this case is eight times a regular payout.

When the player is notified of the number of free games and the payout odds thereof by using the sub-display 4, the number and the payout odds, which are displayed on the sub-display 4, are displayed step by step at three stages as shown in FIG. 9.

By using FIGS. 10A to 10C, a description will be made more in detail of such step-by-step display while taking as an example the case where the random number value for deciding the number of free games is 80 and the random number value for deciding the payout odds thereof is 115. When the bonus game process (S3 of FIG. 8) is ended, and the gaming state is shifted to the bonus game (process from S4 of FIG. 8 to S5 thereof), as the bonus game contents decision game, a predetermined character effect is first performed on the character effect portion 85 of the sub-display 4. In addition, “3” is displayed on the number-of-free-games display portion 86, and “×3” is displayed on the payout odds display portion 87 (refer to FIG. 10A). Subsequently, the predetermined character effect is played again on the character effect portion 85, the display on the number-of-free-games display portion 86 is updated to “8”, and the display on the payout odds display portion 87 is updated to “×5” (refer to FIG. 10B). Thereafter, the predetermined character effect is further performed on the character effect portion 85, the display on the number-of-free-games display portion 86 is updated to “10”as a final value of the number of free games, and the display on the payout odds display portion 87 is updated to “×8” as a final value of the payout odds thereof (refer to FIG. 10C).

As described above, when the number of free games and the payout odds thereof are increased monotonously, the contents of the bonus game gradually become advantageous contents for the player, and the player acquires an extremely advantageous position in terms of the acquisition of the coins. Therefore, the player anticipates that the contents of the bonus game to be displayed from now on will become more advantageous contents than the contents of the bonus game currently displayed, and the player will raise expectations thereof to acquire a large amount of the coins every time when the contents of the bonus game are changed.

Hence, in the gaming machine according to the embodiment of the present invention, even when the gaming mode is shifted from the base gaming mode to the special gaming mode, the player does not get bored, and can continue to enjoy the games while feeling fun. Specifically, the entertainment factor of the slot machine 1 is increased as compared with that of the related slot machine.

In the above-described example, the displays of the number of free games and the payout odds thereof are classified into three stages. However, the numbers of the respective display stages of the free games and the payout odds can be increased and decreased as appropriate. For example, the number of free games may also be displayed at two stages, and the payout odds thereof may also be displayed at five stages.

Timing to update the displays of the number of free games and the payout odds thereof may be set evenly, or may be changed as appropriate in response to the number of display stages. For example, the displays of the number of free games and the payout odds thereof may be updated every ten seconds. Alternatively, an effect time of the bonus game contents decision game may be set in advance at a predetermined time (for example, 30 seconds), and in the case of displaying the number of free games and the like step by step at ten stages, display thereof may be updated every three seconds.

The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, the input command from the player is received by the touch panel 3a of the main display 3, thus making it possible to make the bonus game contents decision game rich in interest. Specifically, before the bonus game contents decision game is started, or while the bonus game contents decision game is being played, a plurality of items (for example, bomb, cake, spear, hammer, and the like) are displayed on the main display 3, and an item selected by the player is received from the touch panel 3a. Then, a contents change process preset for each of the items is performed.

More specifically, the main CPU 32 operates as a game contents change unit, and as the contents change process, changes final values of the number of free games and the payout odds thereof in response to the above-described input command from the player, which is received on the touch panel 3a. Then, the main CPU 32 displays the final values thus changed on the number-of-free-games display portion 86 and the payout odds display portion 87. Alternatively, the main CPU 32 operates as a displayed game contents decision unit. As the contents decision and change process of the displayed game contents, the main CPU 32 decides the numeric values (that is, contents to be displayed step by step) to be displayed until the final values are displayed on the number-of-free-games display portion 86 and the payout odds display portion 87 and changes increase rates of the number of free games and the payout odds thereof in response to the above-described input command from the player, which is received on the touch panel 3a. Then, the main CPU 32 displays the number of free games and the payout odds thereof on the number-of-free-games display portion 86 and payout odds display portion 87 of the sub-display 4 according to the increase rates thus changed.

Specifically, the input command from the player is received, the input command is reflected on the display of the bonus game contents (or on the display process of the bonus game contents), and the entertainment factor of the game is thus increased. Timing and number at which the player is allowed to select the item may be decided randomly by using the random number values as described above.

It is not necessary to display the contents of the bonus game step by step in both of the number of free games and the payout odds thereof. Only one of the both may be appropriately displayed step by step. Moreover, the bonus game transition condition is not limited to that the joker symbol T1 is stopped on the center reel 3E, and it is possible to appropriately change the bonus game transition condition to a variety of publicly known bonus game transition conditions such as that predetermined symbols are arrayed on a predetermined payline.

In the above-described example, the slot machine including the nine display areas 3A to 3I has been shown. However, the slot machine may also be a 3-reel slot machine or a 5-reel slot machine, which includes three or five display areas.

Claims

1. A gaming machine, comprising:

a display including a plurality of display areas on which a plurality of symbols are variably displayed and stopped; and

a processor configured to control the display, decide a symbol combination to be stopped on the display areas, determine whether or not a transition condition for shifting a game from a base game to a bonus game is established based on the symbol combination, decide a game content in the bonus game if the transition condition is established, and notify a player of the game content updating so as to become advantageous step by step for the player.

2. The gaming machine of claim 1, further comprising an input device configured to receive an input command from the player,

wherein the processor changes the game content in response to the input command and displays the changed game content on the display.

3. The gaming machine of claim 1, further comprising an input device configured to receive an input command from the player,

wherein the processor decides the game content to be displayed step by step on the display in response to the input command.

4. A method of controlling a gaming machine, comprising:

variably displaying a plurality of symbols on a display including a plurality of display areas;

deciding symbols to be stopped on the display areas;

determining whether or not a transition condition for shifting a game from a base game to a bonus game is established based on the decided symbols;

deciding a game content in the bonus game if the transition condition is established;

notifying a player of the game content updating so as to become advantageous step by step for the player.

5. The method of controlling a gaming machine according to claim 4, further comprising:

receiving an input command from the player;

changing the game content in response to the received input command; and

displaying the changed game contents on the display unit.

6. The method of controlling a gaming machine according to claim 4, further comprising:

receiving an input command from the player;

deciding and displaying the displayed game content to be displayed step by step on the display unit in response to the input command.

7. A gaming machine comprising:

a base game operable upon a bet made by a player;

a bonus game initiated upon the occurrence of a triggering event in the base game;

a display adapted to display the base game and the bonus game; and

a processor in communication with the display, wherein the processor is operable to

(a) determine a game content in the bonus game,

(b) when a game shifts from the base game, display the game content updating on the display so as to become advantageous step by step for the player.

8. The gaming machine of claim 7, wherein the processor changes the game content in response to a predetermined operation of the player.

9. The gaming machine of claim 7, wherein the game content is a multiplier being activated during the bonus game.

10. The gaming machine of claim 7, wherein the game content is a number of free games being activated during the bonus game.