Angriff vom Saturn
It's the year 3860 and the inhabitants of the Saturn are attacking Earth. And you are a fighter pilot, who is countering that attack.
All what you have to do is very simple. Just survive the enemy attack for two minutes and you have won the game.
But of course this is a bad strategy for the highscore. What you really have to do is to destroy as many alien ships as possible, by avoiding being destroyed yourself.
To help you in those two minutes, there are three power-ups in the game: Power Tool (increases shield and weapon power), Alien Tool (makes you invincible for 5 seconds) and "Mini Spaceship" (removes half of the enemy ships on the screen).