Aveyond: Gates of Night

Before his untimely death two hundred years ago, the evil sorcerer, Mordred Darkthrop, created two opposing magical orbs - the Orb of Darkness, and the Orb of Light. Unwittingly stolen by Mel, a young thief, and placed into the hands of Gyendal, a vampire who calls himself the Lord of Twilight, the Orb of Darkness is about to be used to plunge mankind into eternal night and slavery.