Uridium

The solar system is under attack! Enemy Super-Dreadnoughts are in orbit around each of fifteen planets in this galactic sector. They are draining the mineral resources from the planetary cores for use in their interstellar power units. You must destroy the enemy fighter patrols, neutralise the Dreadnought surface defenses and land and destroy each ship.

Uridium for MSX is a very accurate conversion of the classic Commodore 64's shoot'em up,