This method is described in the guide of one of the Steam users.

Alternatively, the mods have to be placed traditionally much like in L4D1 by placing any mods inside the separate folder and place it onto the root of the Left 4 Dead 2 directory and then create a new line in the gameinfo.txt file for the corresponding mod folder that the user created in the root of the Left 4 Dead 2 directory.

Sadly, this will only allow mods to work if player who did this is the host (you can't use mods in servers/games where you are not the host.

However, it is possible to bypass this by editing addonconfig.txt file and changing every '1' to '0' in it.

As of Novemupdate, Steam Workshop mods were disabled in the official servers in Versus, Realism Versus, and Scavenge Modes for balancing reasons, most likely regards to Weapon Scripts.

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.

Some custom skins (especialy infected mods) can prevent others from joining on local server (as the game tries to download the said skin) unless guests' 'downloading custom content' is set to off. It rarely causes issues on official servers, though one can still encounter this should the skin mod exceed the allowed size.

Skin mods (usually weapon worldmodel and infected skins) can cause problems when playing on local servers if the host server's CVAR of sv_consistency is set to 1.

Users may assemble multiple add-ons in Collections, so the others can instantly subscribe to all the add-ons from these at once. One can also add an item to their Favorites by clicking on the heart sign in order to easily find it later. The items can also be sorted by the number of subscribers, popularity, the date of release over a specific time period. One can use multiple tags to search needed items. 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. 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. This made acquiring addons easier since it automatically updates the addon when needed, unlike manually placing one.

These can be downloaded by clicking 'subscribe' and deleted by clicking 'unsubscribe'. The Workshop is split into various categories, such as Custom Campaigns, weapon/skin mods, sound mods, UI mods, and other kinds of modifications. It was introduced after the Februupdate along with most other games such as Counter-Strike: Global Offensive, Team Fortress 2 and notably Garry's Mod.

Gmod left 4 dead