Oh my God, how long I've waited for this. The most creepy song EVER is this one, and I defy you to find something more creepy. Just picture me when I was 11, playing FF7 at midnight in my pitch black basement; never have I been more creeped out by a video game song.
All of the darkversions of places in Metroid Prime 2 are pretty creepy, especially when there's no enemies and you feel like you're going to get ambushed.
Zelda, Final Fantasy, Silent Hill, yeah, they've all got creepy music. But how many of us who were around when Pokemon was new didn't get goosebumps at Lavender Town? [url=http://www.youtube.com/watch?v=JNJJ-QkZ8cM]
In second place, the drowning music from the first Sonic.[url=http://www.youtube.com/watch?v=9Yw5jkAHgME] (I know both are reliant on nostalgia, but it still counts to those of us who were around when these franchises started.)
'Cave of Bad Dreams' - 'Rayman II' 'The Broken Seal'(Beginning) - 'Grandia II' 'Trouble at Night' - 'Dragon Quest V: Hand of the Heavenly Bride' And last, but not least, 'Trail of Blood' - 'Final Fantasy VII' That one gave me nightmares for a month.