Baraduke

Baraduke is a scrolling shooter arcade game that was released by Namco in 1985.

Introduction
The player takes control of a spaceman named Kissy who must fight his way through the 48 floors of Paccet Planet. Press the firing button to make him fire his ray gun at the enemies. On every regular floor there are a certain amount of enemies named Octy, which will often leave capsules behind when killed. When all of the Octy on the floor have been killed, the pipe at the bottom of the floor will open. Go down the pipe to go to the next floor. Every six floors there is a boss floor, and the boss must be killed before you can move on to the next floor.

A sequel named Bakutotsu Kijuutei was released in 1988, but only in Japan.