There was a random alien sighting caught on tape.
The aliens have invaded earth and you as a general of the mercenary pilots must fight them off. Command a fleet of fighter planes and utilize the special attacks to repel the alien invaders.
Defend your base from huge hordes of alien critters. Bombard them with cannons, lasers, and more while upgrading your base so you can survive the onslaught.
Another one of those random alien sightings.