Here's one to start off with

[youtube]TWf5yBMNrrA[/youtube]

[youtube]JUw2UwuwpXQ[/youtube]

Love these songs anytime, but they have a creepy theme that goes well with Halloween.

[youtube]rGjbDsjuoA8[/youtube]


[youtube]Lt15H1s5GNw[/youtube]

[youtube]BgqtIUsnxng[/youtube]

[youtube]H0WhLzMrWiU[/youtube]

Pretty much most electric Buckethead
I could go on.

Anything by Type O Negative works for me.

[youtube]fp9BSmxgUxs[/youtube]
Naturally.

Also:
[youtube]ZxWSdcKvVAw[/youtube]

[youtube]sh0SzRvBW34[/youtube]
And other songs of the such.

Not to be too obvious, but....

[youtube]MMLXoobDKWs[/youtube]

This was always a good one, though:

[youtube]pOn1037ZLwA&feature=results_video&playnext=1&list=PL74F31031EE977891[/youtube]

I admit I have a massive soft spot for these guys.

[youtube]e_s2Og50B00[/youtube]

[youtube]so1FnXTaUm0[/youtube]

[youtube]rUxVVHLRoz0[/youtube]

Pretty much everything of theirs is suitable Halloween stuff, actually.