MP3s.
Did you know that the Atari 2600 is capable of creating beautiful music? If you know how to program it right, it can sound almost on par with an NES, even though there's only 2 channels! Listen to the music. This will be added to later.
BMX AirMaster title screen
Gyruss in game
Ikari Warriors in game
Pitfall 2 opening
Skateboardin' in game