Bakutotsu Kijūtei (爆突機銃艇, lit. "Bomb Thrust Machine Gun Vessel"), or fully titled as Bakutotsu Kijūtei - Baraduke II, is a scrolling shooter arcade game that was released by Namco in 1988 only in Japan. It is the sequel to Baraduke, which was released 3 years earlier.
In the beginning, it seemed that the Rose Duke Fortress, where the Octi family lurked, the activity of the first rescue corps disappeared several years ago; however, it was not so. The mission that was given at the end are things to annihilate: the brutal space life Octi family.
Source: Wikipedia, "Bakutotsu Kijūtei", available under the CC-BY-SA License.