A game processing device includes a scene determination portion, a sound recognition portion, a conformity determination portion, and an action controller. The scene determination portion determines whether a scene is an input scene in which sound input information can be input. The sound recognition portion, at an input scene, recognizes sound that is input as the sound input information. The conformity determination portion determines a degree of conformity between (a) the sound input information that is recognized and (b) reference information. The action controller changes an action effect according to the degree of conformity.