This was the first release by Imagineer on the WAVE JACK label, which, in exchange for the then-exorbitant price of 5000 yen, came with an audio tape (containing music and the storyline), a novella-with-hintbook, lyric sheet, and the FDS disk itself.  It was thus unavailable from Disk Writer stations (where FDS games were sold for 500 yen.)

Ginga Denshou is an RPG-style overhead action-shooting game, with a vertical space-shoot-em-up used to connect the action levels.  It is most similar to Guardian Legend or Super Star Force. The "RPG" elements come into play in that you'll need to do lots of old-style RPG grinding, destroying enemies to collect Gold (used to buy more powerful weapons & equipment), Oxygen (which trickles down constantly in the action levels), Cannon Shots (powerful bullets), Life, etc. There is also a leveling system where on early planets, enemies drop only a little Gold, until you reach a certain amount, at which point they stop dropping Gold altogether. You'll have to move on to a later planet to defeat tougher enemies, where they start dropping comparatively large amounts of Gold. That sort of thing.

The human race had migrated from Earth to the planet Kyril. Disastrously, a mysterious disease dubbed "SUDO" started infecting the people. It is believed that the cure for this disease lies on the planet Hope, a planet whose ancient civilization had once spread all over the star system. Many areas on these planets contain clues written in the ancient Hope language, directing people to the cure, if they can read such writings.

It appears that there are 6 treasures scattered on the satellites around and including Hope. If a person collects all 6 treasures (collectively named "KIRUNO" in the story) by the time they reach the centre of Hope, they will be able to exchange them for the fabled "Medicine of the Gods", the cure for the SUDO disease infecting humankind.

Three human friends, Satoru, Rita, and Lyle, have set out on a mission to find these treasures in their spaceship, the Nebula. Satoru pilots the Nebula in the space segments, while Lyle assists as the mechanic and Rita provides and mixes medicine. On the planet's surface, Satoru skims down from his ship in a one-man pod, the Uryu, and explores the area in his space suit.