Note: The finished result can be found in this GitHub repo[github.com], with it you can skip most of the steps here if you need express results. ⏩

You need to download 4 things:

• Metamod[www.metamodsource.net]
  
• SourceMod[www.sourcemod.net]
  
• [L4D2] ABM: A MultiSlots / SuperVersus Alternative[forums.alliedmods.net]
  Don't click Get Plugin link, just the files that are shown with the red arrows
  
  
• Left 4 Dead Slots[forums.alliedmods.net]
  
  Note: Some people reported that using l4dtoolz (from the section bellow), works better for them, so if your game crashes try using l4dtoolz instead Left 4 Dead Slots.
  

These are all of them downloaded.

After you have all the files we need you need to put them in the right directory of your already existing game.

• Select the game from your library > Right click on it > Properties
  
• Local files > Browse...
  
• Open left4dead2 folder
  

This is the directory (in my case)

• C:\Program Files (x86)\Steam\steamapps\common\Left 4 Dead 2\left4dead2

we will be installing/moving the files we have downloaded.

• mmsource.zip
  
• sourcemod.zip
  
• abm.smx
  
• abm.txt
  
• l4dslots.smx
  
• l4dslots.txt

We will start with the first one Metamod (mmsource.zip).

You will see that both mmsource and sourcemod zips have a similar folder structure as our game folders

so extract them in their respective folders, meaning that contents from addons in the zip file goes in the addons folder in your game and so on.

Continue with the Sourcemod (sourcemod.zip) and do the same - extract contents in their respective folders (addons in addons, cfg folder in cfg) in your game.


This is how your addons folder should look like after you have finished extracting the files from both zips.

Drop them in .../left4dead2/addons/sourcemod/plugins/

Drop them in .../left4dead2/addons/sourcemod/gamedata/

Open ../left4dead2/cfg/sourcemod/sourcemod.cfg file with any text editor and add on new line this command/config

• sv_maxplayers 8

this will make your local server to always start with 8 players as max players.

Open ../left4dead2/addons/sourcemod/configs/admins.cfg file and yourself like so


you can use this website[www.steamidfinder.com] to get your steam id to put as your identity in that file.

Subscribe to

• 8 slots lobby fixed - allows you to see 8 players lobby in your local server
  
  
• Admin System - this is optional, it just gives you some more control over your server as admin, like if you want to fool around and spawn 10 witches for example

As a sanity check, if your addons (Addons menu) are working correctly, they will be white color here
if they are in red color then you need to disable some of the addons that have conflicting files with them. Until they start working.

Add -insecure launch option for the game.
It is necessary as long as you're hosting that custom server, otherwise, you can remove it because this option won't allow you to join the official Left 4 Dead servers.

In case you are suffering from success and your lobby is more than 8 players, you can download and use L4DToolZ Metamod plugin[forums.alliedmods.net].

Drop in .../left4dead2/addons/. You can delete l4dtoolz_mm.so from the folder as its not needed for windows

Drop in .../left4dead2/addons/metamod


Open ../left4dead2/cfg/sourcemod/sourcemod.cfg file with any text editor and add on new line these new cvars:

• sv_maxplayers 14
  
• sv_visiblemaxplayers 14
  
• sv_removehumanlimit 1
  
• sv_force_unreserved 1

this is how it looks status command if plugin worked, it should say unreserved

Every player after the 8th will need to join after server/game starts and use your IPv4 address[whatismyipaddress.com] followed by 27015 in the game console.

e.g: connect 151.251.110.99:27015

When you open the game you will see this.
It's okay, just proceed by making your local server and enjoy it with all of your friends.

Helpful links

• reddit post
  
• video I found
  
• Sourcemod wiki[wiki.alliedmods.net]
  
• Metamod wiki[wiki.alliedmods.net]
  
• If you need help with setting up your server, join our discord[discord.gg]

This is all I can think of while making this guide if you have any suggestions or questions let me know down below in the comments. Thank you! 😛