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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 Forum Is Active


Killing Floor Forum Is Active

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

Sep 5, 2012 News
Killing Floor 2.52 Out Now


Killing Floor 2.52 Out Now

Second community-revised version of the legendary UT2004 mod released.

Jun 1, 2010 News
Killing Floor 2.51


Killing Floor 2.51

Killing Floor 2.51 is on the horizon! A "Boss" enemy is in the works! Donations are now being accepted! Donation "perks" announced :)

Sep 14, 2008 News
Killing Floor 2.5 RELEASED.


Killing Floor 2.5 RELEASED.

The cooperative survival horror mod for UT2004 gets its 5th official release! And this is a big one!

Jul 6, 2008 News
Killing Floor 2.5 Release Date!


Killing Floor 2.5 Release Date!

Killing Floor 2.5 Release date - Friday July 4th.

Jun 28, 2008 News
Post comment Comments  (0 - 10 of 931)
PatPeter Jan 26 2014, 4:19am said:

I receive this error, does anyone know how to fix it?

General protection fault!

History: UObject::ProcessEvent <- (KFHumanPawn KF-WestLondon.KFHumanPawn, Function KFMod.KFPawn.PostNetBeginPlay) <- ULevel::SpawnActor <- (KFHumanPawn) <- UObject::ProcessEvent <- (KFGameType KF-WestLondon.KFGameType, Function KFMod.KFGameType.PendingMatch.Timer) <- AActor::Tick <- TickAllActors <- ULevel::Tick <- (NetMode=2) <- TickLevel <- UGameEngine::Tick <- Level KF-WestLondon <- UpdateWorld <- MainLoop <- FMallocWindows::Free <- FMallocWindows::Realloc <- 676F4C57 0 FArray <- FArray::Realloc <- 0*2 <- FMallocWindows::Free

+2 votes     reply to
MuffinLIKE Sep 7 2013, 1:16am said:

????? ????? ??????? 2004? ???? ?????..! ????? ???????.

+2 votes     reply to
shave Aug 13 2013, 12:23pm said:


+2 votes     reply to
duststorm9711 May 19 2013, 12:05pm said:

It wouldn't let me play normal UT2004, so I uninstalled it, and now I can't play either one of them. I get this error message:

Failed to enter Entry: Can't find file for package 'InterfaceContent'

Anybody know how to fix this?

+1 vote     reply to
Guest Jan 8 2014, 8:59am replied:

This comment is currently awaiting admin approval, join now to view.

Rajliv Jun 16 2013, 12:46pm replied:

It doesn't affect UT2004 at all, you must have installed it wrongly.

+1 vote     reply to
Olle46 Mar 19 2013, 11:55am buried:


killing floor is already a game made by trip wire

-9 votes     reply to
a94uricom Apr 11 2013, 1:05pm replied:

When you DO not know anything about the subject just DO not talk about it , or read the description : it says that it was released in 2007 (even if 1.0 was released in 2005), and KF retail (the game, not the mod) was out in 2009.

+6 votes     reply to
xXNL4PLXx Mar 20 2013, 2:17pm replied:

I see you need small explain,first at all Killing Floor start as mod made by AJ_Quick,later TI took over the right to mod and made standalone KF.

+6 votes     reply to
poompoom500 Mar 2 2013, 7:22am said:

Welcome all to MahloeehDnM Killing Floor mod server --

Hope you come and join. Try your skill at playing the game and making custom maps. Post your maps at the Killing Floor (UT2004) Klub forum --

+1 vote     reply to
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