With all this Twilight and True Blood nonsense, it's a good thing we've still got Vampire Killer:

http://www.joystiq.com/2009/08/29/the-e … ler-theme/

So which ones did they miss?

as far as I'm aware, the article linked to at the Castlevania wikia isn't missing any uses of the song (in actual games).

Oh!

-It's one of the "retro" sounding alternative tunes in Order of Shadows (sadly not a remix)
-The original NES version and the Dracula X Chronicles remix are included on the Castlevania Pachislot OST, and I'm pretty sure they are actually in the game.
-It plays in the original Wai Wai World when you play as Simon
-It's also in Wai Wai World 2, where it plays during the Castlevania-themed stage (Bloody Tears plays during the second half of the stage, and Black Night plays during the battle with Dracula)
-A part of it is part of Simon's theme when he meets you and joins your party (!) in the second Ganbare Goemon Famicom RPG (Ganbare Goemon Gaiden: Tenka no Zaihou)
-It's part of a medley of songs in Dance Dance Revolution Revolution Ultramix 3
-It's also part of a medley in Pop'n Music 15 Adventure (a rather interesting one, since it segues into Bloody Tears, and then into....Enemaos Machine Tower!)

also, Simon Belmont and Richter Belmont are fighters in Battle Tryst, but the game is rare as hell so I have no idea if there's any Castlevania music in it. Not to mention cellphone games.

And....

*Its in Harmony of Dissonance (GBA), the track is called "Vampire Killer 2K2", with the last part being a rendition of "Clockwork" from CV3. No idea how they missed this one, as its in one of the main games.
*It features briefly in Lament of Innocence's (PS2) credits theme "Admiration Towards the Clan", as well as Order of Ecclesia's (DS) intro theme "Ecclesia".
*There's a heavily remixed version (with emphasis on "heavy", haha) in Contra: Hard Corps for the Mega Drive/Genesis, the track's called "Simon 1994RD".

I'm sure there are still more out there...

EDIT: Ah yes, there's also the heavily mutilated version that serves as Castlevania Legends' (GB) final boss theme, as well as "Another Vampire Killer" from the canceled Castlevania Resurrection (DC), if you wanna count that one.

This thread makes me shed Bloody Tears.

Seems he's done many more. Pretty cool.

Wow, that CV Legends version is some real bullshit.

Legends in general was pretty bullshit. I want to love it, but it's basically some good intentions thrown together as sloppily as possible.

Yeah, I knew there was a really obvious one they were missing.  I also thought it was interesting that they only included one of the three soundboard versions from Chronicles.

No kidding. But at least its listenable, try "Vampire Killer" from CV Legends if you want to experience some real aural nausea.