Killing Floor is a survival horror total conversion set in London, England. In a laboratory under the city, a series of human experiments in cloning and biological augmentation are being conducted by the employees of "Horizon". Horizon is a BioTech corporation formerly employed by the government to do the R&D on a top secret series of synthetic combat drugs which would enhance the effectiveness of soldiers in the field. Horizon's funding was cut, when their practices were deemed too immoral even for such a controversial project, but the research didn't stop. Funded by private money from the deep pockets of Horizon chairman and research scientist Kevin Clamely, tests continued in a more...private location. That was until something went wrong. There were reports that the lab had been comprimised; that the subjects were behaving abnormally...then, silence. Several days later, twisted shapes began to emerge from the confines of the lab into the city above.

Report abuse Killing Floor 2.5
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Jul 5th, 2008
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The definitive cooperative survival horror mod for UT2004. Play as part of a squad of soldiers, attempting to survive a horrific onslaught. Use weaponry , wits, and teamwork to overcome hopeless odds. And see if you have what it takes to survive ....on the Killing Floor.

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Killing Floor 2.5
Post comment Comments  (0 - 50 of 85)
DanTheMan004 Jul 6 2008, 2:43am says:

First comment! Let me say I am proud to download this coveted beauty!

+1 vote     reply to comment
Crasty Aug 27 2008, 11:29pm replied:

THis mod is Awesome but i wish i could play it at crastys!

+1 vote     reply to comment
3aTmE! Jul 6 2008, 2:49am says:

WHOOOHOOO! WELCOME 2.5!! thanks alex.. :D
ps: SECOND POST!! ^^

+1 vote     reply to comment
{SOTW}LoneWolf Jul 6 2008, 2:53am says:

FileFront link seems to be broken?

+3 votes     reply to comment
AJ_Quick Author
AJ_Quick Jul 6 2008, 3:05am says:

Filefront has been mentally retarded lately.
There's another FF link which *does* work, on the KF forums...

+4 votes   reply to comment
5hort3 Aug 22 2008, 9:59pm replied:

that link is broken too

+1 vote     reply to comment
ZergLurker Jan 30 2009, 9:10pm replied:

Killing Floor v2.5 Link

+1 vote     reply to comment
DjozeR Jul 6 2008, 3:24am says:

Now I'm going to install my UT2k4 just for that awesome mod :D

Thank you so much <3

+4 votes     reply to comment
Nova_Police Jul 6 2008, 3:24am says:

Ah, good to see this mod live still with a sizable update. Best of the player versus NPC zombie mods.

+2 votes     reply to comment
gomgom50 Jul 6 2008, 3:48am says:

ahh good that i dint uninstall my UT2K4 :D

+2 votes     reply to comment
Pilster123 Jul 6 2008, 4:52am says:

fantastic i cant wait to play it downloading now

+2 votes     reply to comment
Torabi Jul 6 2008, 8:13am says:

Yesyesyesyessss! Finally out! Thank you Alex, thank you a lot!

+2 votes     reply to comment
NightCurse Jul 6 2008, 8:55am says:




+2 votes     reply to comment
Crashday Jul 6 2008, 10:04am says:


+2 votes     reply to comment
Reptile1992 Jul 6 2008, 11:07am says:

Soo.. Whats new?

+2 votes     reply to comment
freredarme Jul 6 2008, 11:42am says:

Ah bah tient, le francais de pmods sort le mod on dirait :p

+2 votes     reply to comment
RetroXor Jul 6 2008, 3:00pm says:

I really wasn't expecting this much changes, additions and improvements over previous version. I can't emphasize enough how amazing I find this mod for such a small dev-team. Also it's great that the new version got even released because of, from what I've read, such a troubled and misfortune development cycle. Much hard work spent on this mod, Alex and Marco have really earned their applauses.

+2 votes     reply to comment
Nominee Jul 6 2008, 9:32pm says:

My name a Borat. If have bots, I give you sexy time.

Yeah, it's been one of those days... Oh well.

+2 votes     reply to comment
FreTerique Jul 6 2008, 9:45pm says:

does this mod work in LAN?

+1 vote     reply to comment
pvt.Johnson Jul 6 2008, 10:11pm replied:

why wouldnt it work?

+3 votes     reply to comment
CHRISPman Jul 7 2008, 4:19am says:

HELL YEAH.....U guys rok......even m8s dat have neva played a mod b4 love this game and have been waitin.......Keep up the awsome work an keep being awsome.....YAY 4 KF

+2 votes     reply to comment
ussr1943 Jul 7 2008, 4:23pm says:

I loved the previous ver.s I really hope 2.5 will die with lack of servers. Congrats on a fantastic release!

I'm looking forward to seeing what you'll do in U3.

+2 votes     reply to comment
which_direction Jul 8 2008, 3:51am says:

woot... cant wait to play :D

+2 votes     reply to comment
dave_5430 Jul 9 2008, 5:05pm says:

I just hope I helped somewhat by posting a 'SAVE THIS MOD' request on most forums and sites...

I can't believe I missed the goddamn release though, I was paying attention so much and it slipped past me by 3 days... pfeh...

It looks bloody awesome though!

+1 vote     reply to comment
LR01 Jul 11 2008, 2:59pm says:

looks interesting, let's try it out

+1 vote     reply to comment
mastersrp Jul 16 2008, 6:07pm says:

yes, i have been lookin' very much forward to this masterpiece of an update :D

This is gonna be played a lot by me, and it's also the reason i'm installing UT2004 again :D

+1 vote     reply to comment
Xylemon Jul 19 2008, 4:06am says:

It's good to that this mod is still alive and kicking!

+1 vote     reply to comment
25mmcannon Jul 26 2008, 6:30am says:

I just love it !

+1 vote     reply to comment
Witch4r Jul 29 2008, 1:15pm says:

it's almost 2009 now, are people still playing this mod? (I sure goddamn hope so..)

+2 votes     reply to comment
dextronaut Apr 23 2010, 8:17pm replied:

yup always playing man

+1 vote     reply to comment
Pilster123 Jul 31 2008, 9:11am says:

i cant wait until the new website is up and the new patch. :D

+1 vote     reply to comment
ZOMG:3 Aug 13 2008, 4:55am says:

i love this mod

+1 vote     reply to comment
kainer Aug 14 2008, 11:37am says:

why when i launching it getting runtime error? :(

+1 vote     reply to comment
kainer Aug 15 2008, 7:02am says:

i solved that problem, just needed download ECE bonus pack, but why there is just 2 servers?

+1 vote     reply to comment
Alfredo_03 Aug 15 2008, 11:44am says:

Help plz. i installed the ECE bonus pack but keeps getting runtime error

+1 vote     reply to comment
Keptron Aug 20 2008, 10:06am says:


Downloading, looks like good

+1 vote     reply to comment
5hort3 Aug 22 2008, 10:02pm says:

i need a good link to download it. can some one post one?

+1 vote     reply to comment
nightingale2k1 Dec 1 2008, 11:28pm says:

is this mod still working ? the official web was not found anymore.

+1 vote     reply to comment
lawlhat Dec 16 2008, 11:15pm replied:

Yeah the new forums are

+1 vote     reply to comment
WhatANoob Jan 3 2009, 4:19am says:

Help when i Start The Story Mode or Survival mode . This Shows up KFMod Build UT2004_Build_[2004-09-02_05.02]

OS: Windows XP 5.1 (Build: 2600)
CPU: GenuineIntel PentiumPro-class processor @ 3176 MHz with 2047MB RAM
Video: NVIDIA GeForce 8600 GTS (7824)

Assertion failed: GIsEditor || GetSuperClass() || this==UObject::StaticClass() [File:.\UnClass.cpp] [Line: 881]

+4 votes     reply to comment
WhatANoob Jan 5 2009, 7:24am says:

Will someone Please answer my Question !!

+1 vote     reply to comment
WhatANoob Jan 6 2009, 5:01am says:

never mind got mulitplayer working had to install the latest patch lol.
Singelplayer remains a mysterie (doesn't work).

+2 votes     reply to comment
Redexodus Feb 1 2009, 12:25am says:

Someone help please. im trying to install this mod but i don't know how. i have the steam version of ut2004. someone please help.

+2 votes     reply to comment
1st-timberwolf Feb 2 2009, 10:09am replied:

its easy download it and paste it from the zip file to whatever disk space you have the game like C:\Program Files\UT2004. and there you go but you need the latest ut2004 patch to play it though hoped i Helped.
Enjoy !!!!!

+1 vote     reply to comment
Camopig Mar 26 2009, 8:19pm says:

Since you moved the forums and the wiki dont work. Can someone please tell me how to install this mod? I downloaded UT2004 on steam, now how do I get this to work?

+1 vote     reply to comment
poompoom500 Creator
poompoom500 Apr 14 2009, 10:56am replied:

To Camopig,

"Can someone please tell me how to install this mod?" First things first - read this important message - Then read this instruction carefully. Install the mod to a "Temp" directory by changing the default directory "c:\UT2K4\KFMod20" to c:\Temp\KFMod20. Then copy/paste KFMod20 directory to Unreal Tournament 2004 from "Program Files"! And you're done!

+1 vote   reply to comment
poompoom500 Creator
poompoom500 Apr 14 2009, 10:30am says:

Are we to expect a version 3!??? Love the mod!

0 votes   reply to comment
paddypadpad May 9 2009, 1:07am says:

Omg this is cool as i will have to buy it off steam.

0 votes     reply to comment
cyber02000 May 9 2009, 11:02am says:

guys i really wanna play this mod ....but i dsnt seem to run on my pc..!!!! on first run i had some texture error.....on second run i had a runtime error....i updated ut to the latest version but still get runtime error........!!!
do i ned to install version 2 first

help plz

+1 vote     reply to comment
cyber02000 May 9 2009, 11:07am says:

this was the first error

KFMod Build UT2004_Build_[2005-11-23_16.22]

OS: Windows XP 5.1 (Build: 2600)
CPU: GenuineIntel Unknown processor @ 2396 MHz with 766MB RAM
Video: RADEON 9200 PRO Family (Microsoft Corporation) (6462)

Failed to enter KF-Menu.ut2: Can't find file for package 'ONSBPTextures'

History: UGameEngine::Init <- InitEngine

+1 vote     reply to comment
--ares-- May 21 2009, 1:23am replied:

reinstall the game. if that fails then drivers. You might be having difficulty with your vid card, can it run ut2004?

+1 vote     reply to comment
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Release Date
Released Aug 13, 2007
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