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"Your own custom apocalypse. Discover and download new maps, Add-ons, Mutations and more! Want to try your hand at modding or want to upload your mod to Steam? Click here to learn more."
―Workshop description

The Steam Workshop is a database for uploading to user-created content available on Steam. The only game in the Left 4 Dead series with Steam Workshop support is Left 4 Dead 2.

It was introduced after the February 7, 2013 update along with most other games such as Counter-Strike: Global Offensive, Team Fortress 2 and notably Garry's Mod.

The Workshop is split into various categories, such as Custom Campaigns, weapon/skin mods, sound mods, UI mods, and other kinds of modifications. These can be downloaded by clicking "subscribe".

This made acquiring addons easier since it automatically updates the addon when needed, unlike manually placing one. Furthermore, if a user has multiple devices, it will download the mod to any that the user downloads Left 4 Dead 2 to, so long as they use the same Steam account.

On the downside, it does require a constant network connection to use the addons, though the game does not need a connection to play offline.


  • Generally, skin mods generally can cause problems when playing on local servers if the host's server's CVAR of "sv_consistency" is set to 1. It rarely causes issues on official server, though one can still encounter this should the skin mod exceed the allowed size.
  • Usually, if a PC has multiple users logged on it and should another user have launched Left 4 Dead 2 on the same PC, it may require a re-download of all mods, even if it's already in the folder.

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