Ace Combat 04: Shattered Skies — The single-player campaign consists of 18 missions, forming a completely linear plot. Before each mission, the player undergoes a briefing, which includes the current state of affairs, prerequisites and goals of the operation, and selects one of the aircraft and weapons available to him. The game features 21 aircraft models, including real and one fictional aircraft. To complete a mission, the player must complete all its objectives within a certain period of time, and in some missions there is an update of objectives.