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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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.

Killing Floor Forum Is Active

Killing Floor Forum Is Active

3 years ago News 0 comments

The Killing Floor mod is still alive. And the forum is available to those who want to post anything related to the mod.

Zoo's Clone Bandits Vehicles For KF Mod

Zoo's Clone Bandits Vehicles For KF Mod

3 years ago News 0 comments

Get some wheels for your mod. Place Zoo's Clone Bandits' vehicles to your KF Mod maps.

Tripwire Interactive Announces Killing Floor

Tripwire Interactive Announces Killing Floor

6 years ago News 147 comments

The cult favorite Unreal 2k4 mod goes retail on Steam!

Patriarch Gameplay Video + Map Contest!

Patriarch Gameplay Video + Map Contest!

7 years ago News 31 comments

What do you get when you match the mutated evolution of a research biologist against an armed-to-the-teeth commando? Just over a minute of bedlam, of...

Killing Floor Linux version

Killing Floor Linux version

3 years ago 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]

3 years ago Full Version 15 comments

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

Killing Floor 2.5

Killing Floor 2.5

7 years ago Full Version 89 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

8 years ago 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

8 years ago 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

8 years ago 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  (50 - 60 of 955)
RippinZense Jul 20 2012 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 replied:

Is UE2.5 :D LOL)

+1 vote     reply to comment
AJ_Quick Creator Subscriber
AJ_Quick Aug 22 2012 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 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 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 replied:

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

+4 votes     reply to comment
DevonO0789 Jul 12 2012 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 Subscriber
AJ_Quick Jul 13 2012 replied:

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

+2 votes   reply to comment
hotrodhunter12 Jul 8 2012 says:

I just got the mod and when i start UT 2004 it takes me strate to the Killing Floor menu So i cant play UT 2004 any more HELP!!!!!!

+2 votes     reply to comment
UnShame Jul 11 2012 replied:

you should've put KillingFloor folder (or mb KF or something, idk) INSIDE your UT2004 directory and then run the mod through the Community menu in UT2004 or with shortcut

+2 votes     reply to comment
zoren580 Jul 6 2012 says:

ONSB texture error

+2 votes     reply to comment
UnShame Jul 11 2012 replied:

download ECE bonus pack

+2 votes     reply to comment
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