Take command of an A.D.S (Advanced Defense System) and protect the planet Starhome from attack by the Octobis aliens. Defend your base from the enemy waves and fight against the different enemies that try to destroy your facilities. Each attack will make things increasingly difficult for you, with new types of enemies and more of them, facing squad leaders.

Anticipate your shots to generate destructive waves and kill several enemies in one shot or try to be the fastest with your bullets. After passing each phase you will win game coins with which you can improve your A.D.S. It is the only way to reach the end to face the Lord of the Octobis and save the planet!