Patent ID: 8105152

Claim:
A game system including one or more controllers, comprising: determining means for determining whether a criterion operation data string indicative of a sequence of operation procedures required to cause a special skill event to occur, the sequence of operation procedures being performed on the one or more controllers, has been inputted from the one or more controllers within a determination target period; and game event generation means for generating a game event comprising the special skill event for a two-player competitive fighting game according to a result generated by the determination made by the determining means, wherein the determining means executes a change of a length of the determination target period within which the criterion operation data string has been inputted, to adjust a level of difficulty when a flag indicates the criterion operation data string being inputted within a determination target period and when an occurrence count condition indicates that the special skill event for said two player competitive fighting game has occurred a prescribed number of times, based on a result of a statistic related to a plurality of results of a plurality of past determinations of at least one of the one or more controllers, and wherein the special skill event is associated with the criterion operation data string, and wherein the determining and the generating are performed in a processor.