L4D2 Level Design/Add-on Notes
This summarizes the changes for Left 4 Dead 2 Add-ons to Left 4 Dead's.
The addoninfo.txt file in your L4D2 add-on must have the proper app ID:
If this isn't included, or if it's set to the Left 4 Dead 1 ID (500), VPK files will not be installed properly when users double click on them. (Or technically, the
If users double click a VPK while the game is not running, it gets copied to a temporary location under: