Truxton

The evil Dogurava, commander of an alien army known as the Gidans, is attacking the planet Borogo. The army uses five giant asteroids as fortresses for the invasion. After surviving an attack on an orbiting cargo barge, a lone pilot takes the only remaining fighter craft and embarks on a suicide mission: draw the Gidans' fire to himself, while attempting to bypass their fighters on the way to the fortresses.

Each of these weapons can be upgraded to a more powerful variant by collecting power-ups, up to four levels. Upgrading also grants additional properties when powering up, such as creating a shield around the player-controlled aircraft with the Power Shot. Other power-up effects include increasing the ship's maneuvering speed and gaining extra lives.