The year is 199X and Tokyo is being invaded by Atlantis, or Space Egypt, as I like to call it. You have to defend Tokyo as the Crisis Force. You pilot the Aurawing, a fighter ship with the ability to transform between three different modes, determining the direction of your shots. Separate from the ship modes, you upgrade your weapons in two separate upgrade paths: blue focused fire, and red spread fire. Finally, picking up certain upgrades result in the ship changing into a final, very powerful form. Levels and enemies are varied and extremely detailed.