To relieve time and effort required for a manipulated input.
A game program causes a computer to perform a game that a user performs using a game medium, and causes the computer to perform: a granting processing for granting the game medium to the user; a recording processing for recording the granted game medium granted in the granting processing, as an owned game medium owned by the user; a reception processing for receiving reservation registration of a specified game medium specified by an input from the user; a decision processing, when the grant game medium is granted to the user in the granting processing after the reception processing, to compare the granted game medium to the specified game medium reserved for registration, to decide whether or not the granted game medium is to be made the owned game medium of the user; and an update processing for updating the record of the owned game medium owned by the user based on the decision result in the decision processing.
YOSHIMI KAZUHIRO