“Ace Combat” which made “Fun to fly in the sky” very familiar, “Ace Combat 2” which has evolved dramatically beautifully. And now, the latest series “Ace Combat 3 Electrosphere” will inherit this essence. The stage is a near future world where the power of “economy” has jumped far beyond the power of the state. There, the two companies had a mighty power. One is a multinational composite company “General Resources” with a huge capital, with the military industry as the base, and the other is a “Newcom company” with advanced information technology and science and technology as the base. The two companies, which had a subtle tension relationship, finally entered into a state of engagement. The main character (player) belongs to an organization called UPEO [Yupeio], and it fights at fighter plane to suppress the conflict between the two companies.