BulletAsylum

Annihilate invaders with a wall of firepower in this insane arcade shooter.

BulletAsylum delivers over-the-top action, melding classic gameplay with next generation visuals and mechanics. With an insane amount of firepower at your fingertips, vibrant graphics, and an all-you-can-shoot buffet of alien hordes to destroy, BulletAsylum will blow you away.

Featuring:

• Multiple unique game modes, including Arcade, Survival, and Architect.

• Dozens of upgrades; because bigger guns are better guns.

• Several game modifiers; change the rules - change the game.

• Leaderboards; Show your friends just how much better than them you are.

• Achievements; 200 Gamerscore up for grabs.

Source: Windows Phone Store Description