Patent ID: 7601066

Claim:
A game system having, in a related fashion, a game apparatus having a game program storage device storing a game program, a processing device for executing the game program, and a display device to display an image based on the result of processing by the processing device, comprising: a housing to be held by a player; and a change-state detecting device related to said housing for detecting at least one of an amount and a direction of a change applied to said housing, wherein said game program storage device stores game space data including image data to display a space for game play, and a display control program causes said display device to display a game space based on the game space data; a simulation program provides simulation based on an output of said change-state detecting device such that a state of the game space is changed related to at least one of a change amount and a change direction applied to said housing; said change-state detecting device is to detect, as said at least one change amount and change direction, at least one of an amount and a direction of a tilt applied to said housing, and said simulation program provides simulation related to the at least one of an amount and a direction of a tilt applied to said housing such that the game space is put into a tilted state; said housing is a housing of said game apparatus, and said game apparatus is a portable game apparatus having said display device provided integrally on one main surface of said housing; said game program storage device is accommodated in a cartridge and detachably loaded in said housing of said portable game apparatus, and said change-state detecting device is accommodated in said cartridge for detecting at least one of an amount and a direction of a change applied to said housing of said portable game apparatus.