Brings back great memories of OLD days team-play!
Let me quote the author (Jacob Kaufman) of the MEGAMIX:
you know damned well that the little japanese guys making contra listened to 80's metal. they had rocker! posters with big blond guys holding odd-shaped guitars, faced painted in various ways. and they made prog metal on the NES. the poor guys got slighted - BRILLIANT work was made insignificant in the public eye because it was "blips and bleeps." Only us hardcore nerds can see through the square waves and pick out the music.