imo, the typical method of getting splitscreen to work on custom campaigns takes far too long. considering you'd have to:

1. type a command
   
2. load into a single player game
   
3. type another command when you're in the game
   
4. re load into the game, AGAIN!
   
5. finally enjoy your game

so i made a config that allows you to type one command, load in once, and be playing right away!
my method:

1. type a few letters
   
2. enjoy your splitscreen game !

this guide is for those who just want a quicker way to play custom campaigns in splitsceen. if you just want to play normal campaigns, i recommend just using this addon

open notepad and paste this code:

now save it and name it whatever you'd like, but be sure to save this file in this location:
Steam > steamapps > common > Left 4 Dead 2 > left4dead2 > cfg

IMPORTANT this file MUST be a .cfg file. NOT a .txt file !!!
you must change it after saving it

alternatively, you can just add the lines to the autoexe.cfg (recommended)

otherwise you have to manually execute your custom cfg first for it to work (type "exec *yourfilename*" then enter)



so now all you have to do is type into the console the name of the map, followed by a semicolon and ss.
then you'll be loading directly into your splitscreen game!

here is what it should look like: (example map name is darkmaze)
map darkmaze; ss

simple! also using this method allows you to actually be able to pause the game!
(in the console, use ss_splitmode 2 for horizontal or ss_splitmode 1 for vertical)

type in the console:
maps *

a huge list of the default and custom campaigns you have will show up:

all default campaigns will be in this format: c#m#_whatever
custom maps can be in any format !!

sometimes while playing, you may notice the second players screen gets darker overtime until eventual total darkness.

just type in the console "ssmta" and it should go back to normal, you may have to enter it twice.


Alias is basically a shortcut word, letter or even phrase that is used instead of typing out the full command.
alias format is very simple. it can be done in notepad on a .cfg file.
Format it like this:

• Alias *name of alias* *command line*
  
  
• Example : Alias *fov* *cl_viewmodelfovsurvivor 60*

so now if i type fov into the console, it will read it as the full command of cl_viewmodelfovsurvivor 60, without me having to type all of that out!


your alias can be anything from a single letter to full words and numbers.

thanks for reading !!! i hope this can help someone out there a bit... maybe, idk, i think this is a pretty niche topic, especially at this point.