Left 4 Dead 2 is a cooperative first-person shooter video game developed and published by Valve Corporation. The game is set during the aftermath of an apocalyptic pandemic, and follows the story of four survivors who must escape from a city overrun by infected zombies.
To install Left 4 Dead 2 add-ons, you will first need to download them from the internet. There are many website that offer free Left 4 Dead 2 add-ons, so you should have no trouble finding what you’re looking for. Once you have downloaded the add-ons, you will need to extract them to your Left 4 Dead 2 folder. This is usually located at:
C:\Program Files (x86)\Steam\steamapps\common\left 4 dead 2\left4dead2
If you can’t find your Left 4 Dead 2 folder, you can try searching for it in your Steam library. Once you’ve found the folder, simply extract the contents of the add-on archive to it. For example, if you downloaded a survival map, you would extract the files to the following directory:
C:\Program Files (x86)\Steam\steamapps\common\left 4 dead 2\left4dead2\addons\survival
And that’s all there is to it! Now when you launch Left 4 Dead 2, the add-ons will be available for you to play. Have fun!