According to Houser, "I think the well-executed multiplayer game clearly attracts a big audience, but it doesn't attract as big an audience as in a single-player game. It just doesn't do that yet."
He added, "Not everybody, not even with Call of Duty, not everyone is playing the multiplayer. There's a huge audience for people who love single-player adventures."
Of course, Call of Duty routine has sold blockbuster sales with a stronger focus on multiplayer, while MMOs attract worldwide audiences. Grand Theft Auto IV undersold - could it be possible that Grand Theft Auto Online is driving the sales of Grand Theft Auto V?