This is partly my work. TheBusGuy figured this out and I figured out the fix.

When valve made Left 4 Dead, they didn't include split screen for the PC, but they did include the code for it. In this I will show you how to get the split screen code working.

You will need an Xbox360 controller. I will address what to do if you have a different controller later on.

The first step is to download the code, its in the download tab.

Plug your controller in. Then open up your 360controller.cfg file, its in your "\left4dead\cfg" folder. Copy and paste the code you downloaded over the code in the 360controller.cfg.

Okay, now open up the game, open the console, and type "Exec 360controller.cfg" without the quotations. Then use "ss_splitmode 1" or "ss_splitmode 2", to set the split screen mode. "ss_splitmode 1" is horizontal, and should be used for regular monitors. "ss_splitmode 2" is vertical, and should be used for dual monitor setups and wide screen monitors.

You need to have the controller set to player 1. Start/join a game and as soon as the loading screen appears, unplug the controller, wait a few seconds, and plug it back in before the game starts. That should switch it to player 2.

Now type in "ss_connect", player 2 will connect and start spectating. To make him join a team type "cmd2 jointeam 2". That should fix the update glitch and work perfectly.

If you have a different controller than an xbox360 controller, you will have to download an emulator from Then set up the controllers as you want them to be set up.
If you only have a differant controller, then go in the "xbox360cemu.ini" and set index to -1


Index=0 ----> Index=-1"
then scroll down and set pad 2 index to 1

this should make your one controller bind to player 2.

That is it! Enjoy!

P.S.- If I forgot anything, or if you have something to add, let me know!
There is a hack/code like this one for Unreal Tournament 3 at

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I have figured out how to get split screen working after the DLC/update. I updated the summery, so you can take a look at that now. I doubt you care, but it took me three days of messing with it, to figure it out. I have also added a video, to make it easier to understand. Enjoy having split screen back!
Sorry for the horrible quality.

Left 4 Dead Splitscreen Config

Left 4 Dead Splitscreen Config

6 years ago Source Code 4 comments

This is the code I mentioned. You NEED this to get it to work. So, go ahead and download it.

Post comment Comments  (80 - 86 of 86)
barronofhellion Sep 30 2009 says:

dont understand why this doesnt work in the 1st place , they should have left it in from the xbox version heh

+2 votes     reply to comment
Croco15 Creator
Croco15 Sep 30 2009 replied:

That's what I thought.

+1 vote   reply to comment
tundra_cool Sep 30 2009 says:

Cool, thanks.

PC > XBox

+2 votes     reply to comment
Sp0rk Sep 30 2009 says:

Will this work with mouse+keyboard and another person with a controller or do I need two controllers?

+2 votes     reply to comment
Croco15 Creator
Croco15 Sep 30 2009 replied:

I'm not sure, it might work, I haven't tried it.

+1 vote   reply to comment
ShanoaXAlbus Jun 2 2011 replied:

hi... i have a USB Dual Shock Gamepad VIBRATING search for it in google.

I Followed Your Instructions but when i start the game.
The Player 2 Will not move and when i change the light to player 1
The keyboard will move player 1 and th other controls are played by the controller!!! please help me!

+1 vote     reply to comment
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