Developers: Valve, Ausimus, Snendle, TimEh, J.Sera
Assembly from five excellent campaigns for all known a shooter horror. List of campaigns:
1. No Mercy 2
the version for Left 4 Dead 2 Ausimus
version of campaign 1.43
2. Dead on Time 2
3. Origin Beta
only one level
4. Arena of the Dead 2
5. Left 4 Cake 2
version: 1.0 beta
Place the vpk-file from the folder with the name of campaign necessary to you in the directory Steam/SteamApps/common/left 4 dead 2/left4dead2/addons.
You also shall have a utility of Left 4 Dead 2 Add-on Support from Valve. That to download it, it is necessary to enter Steam, to select the tab of Tools (Tools), to right-click on the name of this program, to select the Install Game item (To set game) and to follow instructions (after the end of loading of any additional actions it isn't required).