[LordSappington]

I've recently gotten addicted to Groov. It's this fun little Indie Game, that plays much like Geometry Wars. The catch here, though, is it's MUSIC BASED. The game immediately has a pulsing beat in the background, and when you fire, it plays music to the rhythm of your gun. Different enemies make different sound effects to the music, and pretty soon, you're making all kinds of crazy-awesome techno to the beat of your enemies DYING. It gets even better once your gun starts upgrading, changing the beat of the game entirely.