Galactor is a terrorist organization that served as the main antagonist group in Science Ninja Team Gatchaman and its sequels.
Galactor was founded by the enigmatic alien lifeform Sosai X having used a mafia group and remodeling it into a full-fledged terrorist group that Earth defenses were powerless against. Through their advanced technology and manpower, they strove to control planet Earth and its natural resources. It was not until ISO had deployed the Science Ninja Team that their plans of conquest or annihilation of Earth were delayed or thwarted.
Galactor had some of the most advanced technology on Earth, having been supplied by Sosai X, able to create giant mechas that can comfortly keep an entire group of soldiers.