They maneuver their fortress into the atmosphere of Planet Bomber. Bomberman, from atop a cliff, observes the Black Fortress' descent. Not much later, the Fortress begins to open fire on the people of Planet Bomber, firing destructive energy rays into populated areas. A warrior clad in white then flies out to the surprised Bomberman, and asks if he plans to defeat the assailants. Bomberman gives an affirmative response, and the stranger (later introduced as Sirius) explains that a force field protects the Fortress from any outside attack. Sirius goes on to say that this force field can be deactivated by destroying the four anchors attached to the Fortress; the "Green Garden": a ruin-filled natural world, "Blue Resort": a fortress surrounded by water, "Red Mountain": a large volcano fraught with danger, and "White Glacier": a large, snowy mountain covered in ice. Once inside the Fortress, they must find and destroy Altair.