It is late in the 22nd century, and the insect-like Galaga are back. Humans have terraformed and colonized most habitable places in our solar system, but the Galaga have only one thing in mind: destruction. The Galaga are mutated nanites that were inadvertently created during the terraforming process. They are deadly, autonomous and great in number, and you must blast them into oblivion. In addition to shooting Galaga, you must perform various mission objectives, such as collecting life pods and activating water turbines.