|Type||Airborne Aircraft Carrier|
|AC Games||Air Combat|
|Armaments||AA Guns, AAM's, Aircraft Catapult|
|Deployment||Rebel Coup D'Etat|
|Operator||Rebel Terrorist Group|
Near the end of the rebellion, the pro-government forces, aided by the Phoenix Squadron, destroyed the final enemy stronghold. Shortly thereafter, allied forces discovered that the enemy was in control of a colossal airborne aircraft carrier. The Phoenix Squadron scrambled in pursuit of the Sky Fortress, but by the time they were airborne it was too late to stop the fortress on the ground. The group intercepted the fortress over the north-east ocean as it was en route to the capital city, and a final confrontation ensued. Despite its superior firepower, the Phoenix Squadron destroyed the ship's engines and bridge, which led its descent into the ocean.
The Sky Fortress is an airborne aircraft carrier capable of launching fighters and interceptors. In appearance, it bears a resemblance to the XB-0 Hresvelgr from Ace Combat Zero, however its airframe is thinner than the Hresvelgr's. Said aircraft are presumably stored within the ship, and are loaded into a catapult at its front. It is propelled by four massive engines located on its wings. The ship is armed with several air-to-air missile launchers and anti-air guns, which are placed on its wingtips and the plane's central area,as well as the aircraft it houses for self defense.
- As of date, this is the only superweapon of the series that does not have an official name.