ThunderGun: The Cybwar Mission

The year is 2880, and as alien races pillage planet Soran for its massive deposits of anti-gravitational minerals, the planet's peaceful inhabitants are forced to flee to Earth. Now orbiting the Earth in their floating Sky-City, the Soranians have begun to rebuild the foundation of their once great civilization. But now that peaceful existence is about to be shattered, because from deep within the Earth a new threat has emerged.
Fly into the heart of danger as you fight to save the Queen of Soran from a sinister Earth Scientist, Gateway, and a power-hungry faction of mercenaries who are bent on capturing the Sky-City. From your turret destroy a never ending onslaught of deadly robotic fighters. With fully rendered characters and terrain, you'll journey deep into Gateway's underground lair to defeat his robotic army, free the kidnapped Queen, and deliver Earth from the grip of this brutal Cybwar.