In the Gauntlet mission, defeat the fourth squadron, Espada, in less than a minute for there to be an extra aircraft in the next fight, Mobius 1. Mobius will immediatly shoot down all the other aircraft with a barrage of missiles (unless you manage to destroy them first). You will then have a one-on-one dogfight with Mobius. He will fire a barrage of missiles in your direction from any angle. Note: This only works on the Ace difficulty setting.