6-player co-op survival horror at its finest! Free updates, free special events and a ridiculous amount of fun!

Public builds
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Counted once we have watched for 90 days (since 21 Oct 2026)
Distinct builds deployed to a game's public (default) Steam branch, as Steam's client network describes them.
Checked within minutes of each Steam change. Observed since 21 Oct 2026.
Source: Steam client network (PICS), App info, public branch. Full methodology
Latest public build
Build 1074376
Update posts
0 postsPosts announcing an update, tagged or not
Posts in a game's official Steam news feed that announce an update: tagged as patch notes by the developer, or plainly about a patch or a released update.
Source: Steam Web API, ISteamNews/GetNewsForApp. Full methodology
Typical gap between builds
Not enough builds yet| Build | Went live | Patch notes |
|---|---|---|
| 1074376 | KF 1065 - Security Update |
From Steam’s client network, last checked . Builds before 21 Oct 2026, when we started watching, aren't listed. Patch notes are the developer’s update post from an hour before to a day after the build. Not every build gets one. How we count
| Posted | Update |
|---|---|
| 19 Apr 2016 | KF 1065 - Security Update Patch notes |
| 2 Dec 2014 | Killing Floor Update - 1064 Update |
| 4 Nov 2014 | Killing Floor Update - 1063 Update |
| 16 Oct 2014 | Killing Floor Update - 1062 Update |
| 16 Oct 2014 | Killing Floor Update - 1061: The Halloween Horror Double Feature Update |
| 3 Jul 2014 |
| Killing Floor Update - 1060 Update |
| 9 Jan 2014 | Killing Floor Patch 1058 Update |
| 7 Nov 2013 | Killing Floor Patch 1056 - Halloween Event Rollback Update |
| 31 Oct 2013 | Killing Floor Patch 1055 Update |
| 24 Oct 2013 | Client Update for MapEndTextures Failure has been pushed live Update |
| 23 Oct 2013 | Killing Floor Patch 1054 Changelog Update |
| 28 Aug 2013 | Killing Floor Patch 1052 Update |
| 24 Jul 2013 | Killing Floor Update 1051 - The Summer Event is Over Update |
| 17 Jul 2013 | KF Update 1050 - Fix for Unlocking Steampunk Mrs. Foster Update |
| 8 Nov 2012 | Killing Floor Update - 1043 Update |
| 23 Oct 2012 | Killing Floor Hill Billy Horror Halloween 2012 Patch Released Update |
| 29 Aug 2012 | Mandatory Killing Floor Update for Clients and Servers is now live Update |
| 9 Jul 2012 | Killing Floor Update 1036 Update |
| 19 Feb 2012 | KF Gun Game Mod v0.60 Alpha Released with New Maps! Update |
| 13 Dec 2011 | Dec 13th Update Update |
| 28 Oct 2011 | Killing Floor Server and Client Update Update |
| 15 Apr 2011 | KF 1021 Update Update |
| 1 Apr 2011 | KF Update 1018 Update |
| 19 Nov 2010 | Killing Floor 1015 Update Released - Required Server Update Update |
| 15 Nov 2010 | Killing Floor Server Patch - Recommended Update for all Windows Server Owners Update |
| 9 Nov 2010 | Killing Floor 1015 Balance Patch 4 Update |
| 7 Oct 2010 | Killing Floor Update 1014 Update |
| 11 Aug 2010 | Killing Floor Update Update |
| 29 Jun 2010 | Killing Floor Bug Fix Update Released Update |
| 27 May 2010 | Killing Floor Mac Update Released Update |
| 30 Dec 2009 | VE3D Readers Choice Awards Final Update - Vote Now !!! Update |
| 24 Dec 2009 | VE3D Readers Choice Awards Update - Vote Now !!! Update |
| 25 Nov 2009 | Update to fix hitches/freezes Update |
| 20 Nov 2009 | Small Update Release Update |
| 9 Nov 2009 | A little Late - Version 1010 Changes (Requires server update!) Update |
| 29 Oct 2009 | Patch 1009 is Live Update |
| 30 Sept 2009 | Killing Floor 1007 Update Released Update |
| 5 Jun 2009 | Killing Floor Update Released Update |
| 21 May 2009 | Killing Floor Update Released - bye bye exploits!!! Update |
Steam keeps no record of past build numbers, so before 21 Oct 2026 a game’s update history comes from its own Steam news: posts tagged as patch notes, and untagged posts that plainly announce a patch or a released update. Older posts are still being read in, most played games first. How we count