As reported by Touch Arcade, Chillingo has this to say about the overall story of the game:
“The Global Defense Force (GDF) reports that Earth is under attack by a hostile, unidentified vessel containing thousands of enemy craft. Striking with unwavering precision, the invasion destroys key defensive facilities to leave Earth and its inhabitants at the mercy of fearsome alien attackers. You are a part of the Assault Squadron, an elite tactical space combat force dispatched by the Federal Alliance to defeat the alien enemy. Assault Squadron’s explosive sci-fi missions and in-depth storyline will thrill shoot-‘em-up fans and casual players as they battle to save the Earth.”
The game will gives users a bit of freedom in their gameplay by offering four different ships, each with their own weapon sets ranging from vulcan cannons and torpedo missiles to high-vortex bombs and spiral grenades. Attacks can also be chained into high-intensity combos. Additionally, four different control setups, including virtual sticks and tilt control will be available to users, so that each player can experience the game as is most comfortable to them.
No release date has been set for the game, but when we know more details, we’ll be sure to pass them along to you.