Altair, the leader of the space pirates, watches from the Black Fortress, using his coveted weapon, the Omni Cube, to completely drain the planet's energy, condemning it to a zombie-like state. Artemis returns to the Black Fortress to meet up with her partners, fellow pirates Orion and Regulus and her superior, Altair. Together, they set their sights on their next target: Planet Bomber, home of the protagonist, Bomberman. 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. Bomberman climbs onto and destroys all four anchors with the help of Sirius, who supplies power-ups and teaches him new techniques. In the process, he kills Artemis and Orion, but Regulus survives. Once the force field around the Fortress is deactivated, the duo enter the Fortress. After sneaking through Altair's security measures, Bomberman finds and confronts Altair, and after a difficult struggle, defeats the pirate. The previously defeated Regulus swoops in and attempts to rescue his master from the battlefield, but is then knocked away by Sirius. Altair drops the Omni Cube, which Sirius lands on the battle platform to retrieve. Altair is annihilated by a newly powered-up Sirius. Sirius reveals that he was only using Bomberman's abilities into taking back the Omni Cube which was stolen by Altair, adding that he was sick of working with him and lying to him during the mission. He takes the Omni Cube and escapes to his secret lair to destroy Planet Bomber. Bomberman pursues him, making his way through the palace, confronting Sirius for his betrayal. When Sirius is about to fire on Bomberman,