Split-screen on PC

Killing Floor

Up to 6 players on one PC, with controllers, keyboard and mouse or several keyboards and mice.

6Verified handler

Handler “Killing Floor 1” by Talos91, version 6

P4+2 more players

What works

With Nucleus Co-op, up to 6 players can play Killing Floor together on one PC, each in their own part of the screen, with controllers, keyboard and mouse or several keyboards and mice. The free community handler “Killing Floor 1” by Talos91 does the setup and was checked by hub moderators: version 6, updated 3 Apr 2023. Killing Floor is a shooter game from 2009.

Players6
ControllersSupported
Keyboard and mouseSupported
Several keyboards and miceOne per player
Hub moderatorsVerified

How to play Killing Floor split screen on PC

Get Nucleus Co-op
Download Nucleus Co-op, free for Windows 10 and 11, and unzip it into its own folder, for example C:\NucleusCo-op. There is no installer.
Keep it out of Program Files, your user folder and OneDrive.
Download Nucleus Co-op
Install the Killing Floor handler
In Nucleus Co-op, search the Hub for Killing Floor and install its handler, or download the handler file from this page and drop it on the Nucleus window. Then show Nucleus where Killing Floor is installed.
Download the handler file (.nc)
Take a seat
Each player presses a button on their own controller to join and takes a spot on the screen. Pick a layout that fits your players.
Playing with several keyboards and mice? Press End once everything is in place to give each window its own cursor.
Launch and connect
Press Launch: Nucleus opens one copy of Killing Floor per player and lays the windows out on your screen. Then link them in game, usually one player hosts a LAN or online session and the others join it. The handler notes say how.

What you need

A Windows 10 or 11 PC
Nucleus Co-op runs on Windows only. System requirements
Killing Floor for Windows
Installed on that PC. Nucleus starts every player's window from that one install.
Nucleus Co-op, free
With .NET Framework 4.7.2 or later and the Visual C++ 2015–2022 runtimes (x86 and x64). Download
Something to play with
One controller per player, or one keyboard and mouse per player. Controllers · Keyboards and mice
A PC that can run 6 copies
Each player runs their own copy of Killing Floor, so the PC carries several times the usual load. Lower the graphics settings if it struggles. Performance tips
A multiplayer mode
Nucleus links the windows through the game's own LAN or online mode; the handler takes care of it.

Handler notes

Tested and working with latest legit Steam version. Brain is the best organ.
So the instances launch and resize correctly make sure to run your main game at least one time before running this. Wait until the first instance starts to open the second one, after you click to open the second instance the first will resize and position correctly.
Create a LAN listen server in one instance and the others can join clicking in multiplayer-LAN tab.
Use the mouse cursor to navigate all instances and map your gamepad in each instance in settings/controls, gamepads are usable until you start a game. Press the back/select button on your gamepad just once if your character stops after firing. Exit the game via the in-game menus for your mappings to save.
If you use keyboards and mice after all the instances have launched, resized and positioned correctly, press the END key once to lock the input for all instances to have their own working cursor and keyboard. You need to left click each mouse to make the emulated cursors appear after locking the input. Press the END key again to unlock the input when you finish playing. You can also use CTRL+Q to close Nucleus and all its instances when the input is unlocked.
PCGamingWiki page.
Authors and Contributors of this handler: Talos91 and ddraig from the Split Screen Dreams Discord.

About Killing Floor

Killing Floor is a Co-op Survival Horror FPS set in the devastated cities and countryside of England after a series of cloning experiments for the military goes horribly wrong. You and your friends are members of the military dropped into these locations with a simple mission: Survive long enough to cleanse the area of the failed experiments!

Summary from IGDB

Killing Floor screenshots

Version history

v6Current
better mkb support and fixes
3 Apr 2023VerifiedDownload (3.3 KB)
v5
handlers
1 Mar 2022VerifiedDownload (2.7 KB)
v4
updated to work in r5.
25 Dec 2020VerifiedDownload (2.7 KB)
v3
No external files needes anymore, settings and mappings save, added Ui option for mkb support.
27 Nov 2020VerifiedDownload (2.7 KB)