Turrican 2 +1, the only Amiga game music in regular rotation on my mp3 player. Really awesome!
Back in the day I recorded the entire Turrican 2 soundtrack onto audio cassette. It's the only game I ever did that with. Chris Huelsbeck is a legend. His R-Type theme was good as well.
But speaking of insanely catchy tunes I think the Robocod music will be with me forever, not to mention Bubble Bobble. And another one off the wall: Rodland.
Oh and mustn't forget Apidya:
http://www.youtube.com/watch?v=PZcT_Kr7tLs
