Abstract: A game system acquires the sleep information of a user and a game that uses the sleep information can be advanced even in a situation where the sleep information cannot be measured appropriately. The game system includes processing circuitry configured to acquire the sleep information of the user, generate modified sleep information with respect to at least a part of the sleep information by modifying the sleep information on the basis of sleep information having different content to the sleep information. When the modified sleep information has not been generated, the processing circuitry determines a first effect of the game on the basis of the sleep information, and when the modified sleep information has been generated, the processing circuitry determines a second effect, the second effect differing from the first effect, on the basis of the modified sleep information.

Abstract: Provided is a program executed by a computer that includes a processor, wherein the program causes the processor to execute a step for acquiring daily sleep information from a user, a step for specifying a first parameter, which is a parameter to be used by the user to play a game, for each date by comparing sleep information of the user over a predetermined period with sleep information of the user for each date, and a step for advancing the game on each date by performing lottery processing using the first parameter corresponding to the date.