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.


* Killing Floor Co-op Survival Horror (Tripwire)
* Killing Floor Mod Wikipedia
* Killing Floor Mod Wiki
* KF Mod Community Team
* Killing Floor (UT2004) Klub
* MahloeehDnM Killing Floor Server

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1 comment by poompoom500 on Feb 27th, 2014

Yes, it is true. My friend the developer whose name I will not divulge, as well as myself, have made some major improvements to the game. We have added more and newer weapons, and a new character which I called the 'Infected'. The additions are displayed below (namely the new textures of the Killing Floor mod characters):

1. Bloat

KFMod30 Pic 1

2. Clot

KFMod30 Pic 2

3. Crawler

KFMod30 Pic 3

4. Gorefast

KFMod30 Pic 4

5. Infected (New)

KFMod30 Pic 5

6. Scrake

KFMod30 Pic 6

7. Siren

KFMod30 Pic 7

8. Stalker

KFMod30 Pic 8

NOTE: There are more updates in the latest version, which will be posted in another news article. Updates in the weapons list. Stay tuned.

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Killing Floor Linux version

Killing Floor Linux version

Dec 31, 2011 Full Version 1 comment

Killing Floor mod Linux version with installer and a few nice features like a cache extractor and playlist generator

Killing Floor 2.52 [Zip archive]

Killing Floor 2.52 [Zip archive]

Dec 19, 2011 Full Version 14 comments

Just a zip version as an alternative to the Windows Installer, extract under UT2004

Killing Floor 2.5

Killing Floor 2.5

Jul 5, 2008 Full Version 86 comments

The definitive cooperative survival horror mod for UT2004. Play as part of a squad of soldiers, attempting to survive a horrific onslaught. Use weaponry...

Killing Floor 2.5 Trailer

Killing Floor 2.5 Trailer

Dec 17, 2007 Trailers 10 comments

Warning : this video contains what could be considered EXTREME and GRAPHIC depictions of violent acts being performed by, and against escaped laboratory...

Killing Floor 2.11 Community Patch

Killing Floor 2.11 Community Patch

Aug 15, 2007 Patch 2 comments

This is a huge update. I would download this if you want to play online so download this to play game. It fixes lots of problems and adds some cool new...

Killing Floor 2.1 Patch

Killing Floor 2.1 Patch

Aug 14, 2007 Patch 0 comments

This fixes some minor errors for 2.0. Recommended if you want to play game only, most use this update.

Post comment Comments  (40 - 50 of 952)
Braindawg Oct 28 2012, 9:37pm says:

Well, I can honestly say I have no respect for the KF team, now realizing what they did to the Out of Hell developer, they went and loudmouthed at him and said his mod was bad, as well as giving him tips on how to make it better, telling HIM what to do. And to add insult to injury, he went through a deep wave of depression, and STILL managed to release the mod and keep up with the communities demands. Killing Floor kept saying how they were superior after they got a mod team, while they were jealous and afraid their mod wasn't going to be good

**** you self-righteous faggots.

+1 vote     reply to comment
zynthetic Nov 12 2012, 9:04am replied:

I think you're very confused. Since I have some experience with this I'll help you out.

...they went and loudmouthed at him and said his mod was AWESOME, as well as giving him KUDOS FOR BEING AWESOME, telling HIM "YOU ARE AWESOME". He went through a deep wave of depression, which was sad but happened after both OOH and KF Demos had been released. Killing Floor kept saying how they NEEDED AN AWESOME PROGRAMMER because it would be pretty rad to have more than 2 people while they were TOTALLY PUMPED and HIGHFIVING their mod wasn't EATING CHILDREN IN THEIR SLEEP, because that was always a concern with us.

+3 votes     reply to comment
macacos2 Nov 10 2012, 6:40pm replied:

Where can I read the ******** they said? The Out of Hell developer is pretty chill despite his mod running like crap on my setup.

+2 votes     reply to comment
Blake943 Nov 9 2012, 2:17pm replied:

haha,then you like standalone?for me mod is badass and nothing change this,anyway from did you get this info,maybe this is from your imagination...

+1 vote     reply to comment
Blake943 Sep 8 2012, 11:16am says:

shame mod will not be expanded :/

+1 vote     reply to comment
poompoom500 Creator
poompoom500 Sep 12 2012, 1:19pm replied:


It really is up to Tripwire. If they allow people to expand on the game, then there are people around who can make it happen. But as of now, our hands are tied!

You can make a difference. Why don't you tell Tripwire to let loose the shackles and allow us to add new stuffs to the mod!??!

+1 vote   reply to comment
dasha007 Sep 1 2012, 7:42pm says:

u realise this is unreal tournement 2004 right? 3 is differen

-1 votes     reply to comment
poompoom500 Creator
poompoom500 Sep 2 2012, 12:38pm replied:

To dasha007,

"u realise this is unreal tournement 2004 right? 3 is differen"
Yes sir. Killing Floor is an Unreal Tournament 2004 mod!

+1 vote   reply to comment
RippinZense Jul 20 2012, 2:41am says:

Hey guys, i want to play the old killing floor for the first time, but i can't start it up, the following box appears when attempt to launch:

Critical Error

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

OS: Windows NT 6.1 (Build: 7601)
CPU: GenuineIntel PentiumPro-class processor @ 2943 MHz with 4095MB RAM
Video: No Video

Assertion failed: sizeof(*this)==GetClass()->GetPropertiesSize() [File:.\UnGame.cpp] [Line: 148]

History: UGameEngine::Init <- InitEngine <- FMallocWindows::Free

Any help would be appreciated

Thank you.

+2 votes     reply to comment
FiredFox3 Aug 18 2012, 4:11pm replied:

Is UE2.5 :D LOL)

+1 vote     reply to comment
AJ_Quick Creator
AJ_Quick Aug 22 2012, 8:13am replied:

what has that got to do with anything o_ 0

@ RippinZense - that error doesn't really say much. You're better off checking the game's log file for more info \System\KillingFloor.log

+2 votes   reply to comment
Technodude010 Jul 10 2012, 5:14pm says:

Okay, so there's KF retail and this UT 2004 mod. Are they in any way connected? Is it the same developer? If not, isn't that copyright?

-3 votes     reply to comment
poompoom500 Creator
poompoom500 Jul 13 2012, 2:33am replied:

To Technodude010,

Well, Alex Quick is the author of Killing Floor (UT2004) mod which was eventually sold to Tripwire and was enhanced to Killing Floor retail.

+4 votes   reply to comment
UnShame Jul 11 2012, 7:46pm replied:

obviously, people who created Killing Floor the game, created this mod before

+4 votes     reply to comment
DevonO0789 Jul 12 2012, 8:48am replied:

originally, this mod came out before the retail version, but it was made by someone else. The people who made Red Orchestra (Tripwire Interactive) became developers and made Red Orchestra into a game, then they asked the owner of the Killing Floor mod if they could own the rights to it, he agreed. The KFmod isn't owned by Tripwire, just the retail version, the people who own the mod as of right now is MiASMA.

+2 votes     reply to comment
AJ_Quick Creator
AJ_Quick Jul 13 2012, 8:46am replied:

incorrect. Killing Floor - in all it's variations (mod , retail, etc) is the property of tripwire interactive.

+2 votes   reply to comment
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Release Date
Released Aug 2007
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Nov 29 2010, 11:13am by JKeltner95

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