Need help identifying some music

[Linkrulezall]

https://www.youtube.com/playlist?list=PL2F15CEFF07EFFE33

Not that much of the music in this Wolfenstein 3d TC based on one of my favorite horror movies is immediately obvious to me, so if anyone has got a better ear than me and can suss out some more of what's in here, then I'd appreciate their help.

The movie itself is in that playlist too. I'd recommend watching it if you can stomach it. Be warned, it's really fucked up.

Intro: "Infuscomus" from Blood
Menu: Nine Inch Nails - Hurt
Help: ?
Intermission: ?
Level 1: ?
Level 2: Nine Inch Nails - Head Like a Hole
Level 3: Metallica - The God That Failed
Level 4: Rob Zombie - Demonoid Phenomenon
Level 5: Rob Zombie - Dragula
Level 6: ?
Level 7: Nine Inch Nails - Head Like a Hole
Level 8: ?
Level 9: Doom 1 Intermission
Level 10: ?
Level 11: ?
Level 12: Metallica - Creeping Death
Level 13: Blood Track 13 (Mall of the Dead?)
Level 14: Doom 2's "The Crusher"
Level 15: Blood Track 13 (Mall of the Dead?)
Level 16: Rob Zombie - Demonoid Phenomenon
Level 17: Rob Zombie - Dragula
Level 18: ?
Level 19: Doom 1 Intermission
Level 20: ?

And here's the movie trailer because why not:

[Memfis]

intro - Infuscomus from the game Blood
level 11 - Track 13 from Blood
level 13 - Blood too I guess?
level 15 - same as 11

[Bashe]

Map 2 - Nine Inch Nails - Head Like a Hole
Map 3 - Metallica - The God That Failed
Map 7 - same as 3

The rest I don't know, but I feel I've heard before somewhere.

[Linkrulezall]

Thanks guys, I've updated the original post to suit these new changes. Also, the readme also credits Nightwish, The Offspring, The Beyond, Eisregen, and Slipknot if any of those ring any bells.