Dangan GB is a short simplistic boss-rush/bullet-hell shmup released for the Game Boy to celebrate the console's 30th anniversary.
For decades the Dangan Empire and the Houdan Confederation have been at war. As the front line sees most of the action, small remote outposts like the one found on the planet Eshus are often undermanned and overlooked. The Eshus outpost has in fact only got an old pre-war spacecraft, one inexperienced pilot, and a spirited technician stationed there. The two are going about their daily business when a screen suddenly flashes the message "RED ALERT! The Houdan Confederation is attacking!" The incoming data states that 6 dreadnoughts have come out of hyperspace near the moon of Eshus. The odds are stacked against them but surrendering the outpost would give the enemy a backdoor into the Dangan systems. There's no helping it, the Houdan Confederation must be stopped! Although not brimming with confidence, they ready the spacecraft. Tally the technician offers her support as the pilot takes off
