I remember having downloaded a pack that had what was pretty much all of Killer7's sound effects (+ other stuff) that I downloaded via a link posted at Gamefaqs long ago. I was going to upload it, but I figured trying to hunt down the source, so here it is.

http://www.megaupload.com/?d=JCQ1O3OG

Community responsible for the rip: killer7.6.for umer.com (had to separate, was getting filtered)
Specifically, User: Sal

What does it include you ask? Well from what I remember hearing:

1. Enemy laughters (quickie: check files 189 through 194)
2. T.V quotes
3. One-liners when doing critical hits.
4. Dude in the Garcian's trailerhouse making noise.
5. Handsome Men exclaiming their names.
5. Gunshot SFX

And a crapton of other noises. There are 1152 files in the SFX folder + 15 misc audio files. Warning though: some of the file names aren't so obvious as to what they're referencing, specifically the "sebattle" files.

BIG UPS!!!
love sfx!!!!

Thanks!

Very interesting... Thanks a lot.

WOW, sounds. like em', grab em', enjoy em', thanks.

You're my hero. I've been looking for these for quite some time so I can put them in my music. I'm working on a "No More Heroes" album thing, so if you've got those SFX Ill be stoked.

Oh god,this is fucking wonderful.

Thank you so much!

Thanks a lot pal!

Thank you! I am going to use a lot of the enemy laughter clips as system sound noises!

Killer7_allSFX.zip (http://www.mediafire.com/?k8r9cbv588zvj1w)
Re-up by me. Fuck da police.

>first post
>already proven yourself to be a total bro

Thank you.

Killer7_allSFX.zip (http://www.mediafire.com/?k8r9cbv588zvj1w)
Re-up by me. Fuck da police.

Also, I don't know where else to put this since the K7SIN forum was taken down, but for the rare person who cares:
Sal, the user who ripped the sfx also ripped most of the 3D models from the game. since they were also hosted on megaupload and I happen to have them on my HDD, here they are. some of it is pretty interesting actually.
Killer7_3Dmodels.zip (http://www.mediafire.com/?j9o0tnh48yhxdy4)
they're in .lwo (lightwave) format, so you can import them into just about any 3D modeling program you want, including Blender (which is free).

HUGE thanks man!! really nice to have such a rare stuff :)

thanks man!!

Amazing. Thanks so much. Anyone have any idea of the name of the audio file with the screaming man in it?

Anyone have another link? The link in OP's post is 404ing for me.

Edit:

I found an alternative link: http://www.mediafire.com/download/k8r9cbv588zvj1w/Killer7_allSFX.zip

thank you, idealsmeantey!

Thank you, in the name of harman