That's definitely a great topic. And a great list you have put together, Terra
I might edit this post later to add more links and other liked soundtracks because I am not good at remembering all of them at the same time:
Commodore AmigaAunt Arctic AdventureThis game has to come first. The music is one of the greatest musics I have heard in any game. Every now and then I just start humming one of the tunes without having heard it again because they are so memorable. Without the music, the game would never have got such a special place in my heart.
http://www.exotica.org.uk/tunes/unexotica/games/Aunt_Arctic_Adventure.html (Play using Modplug Player
http://www.modplug.com/?page=playerinfo)
LemmingsThe music isn't that special and many of the tunes are just remixes of classical tunes or children songs but I still like the music very much because of the simplicity.
Lotus Turbo Challenge IIThere isn't much music in this racing game, but the title/menu music is just so great. When I play it I always have to wait until the menu music is over before I start the race. It's sad that during the races no music is played because I am sure it would have been of a similar quality.
http://www.mirsoft.info/gmb/music_info.php?id_ele=NjQ4 (Play using Modplug Player
http://www.modplug.com/?page=playerinfo)
PCZak McKracken And The Alien MindbendersThe music is great and has got maybe the best quality I have ever heard coming from the PC speaker. Despite the fact that the PC speaker can only play one tone at a time, you hear many different instruments in the intro song. And while most PC speaker tunes I have heard sound a bit out of rhythm because of that, everythings seems timed correctly for this game. A logistic masterstroke.
Link description not available
http://www.sendspace.com/file/9omp5t (OGG Vorbis, playable by most MP3 players)
Monkey Island seriesI like the whole carribean flair of the music and almost every song sounds great in these games.
Nintendo Entertainment SystemMega Man 1Unlike Terra I like the tunes of the first part the most. They are the ones that I can remember best and I like the rhythms.
http://www.zophar.net/nsf/megaman1.zip (Play using an NSF player)