Usually solving problems with VPK file is simple – just install proper software and open the file. Read the guide and open VPK file now!
The VPK (Valve Pak) file format is developed by Valve Corporation and is mainly used for storage and loading of game content used in Valve's Source engine. VPK files have been around since 2004 and are frequently used in many of Valve's Source engine games, such as Half-Life 2, Portal, Left 4 Dead and Counter-Strike: Global Offensive.
VPK files work like a compressed archive - they maintain hierarchies of files and directories and contain multiple types of files. VPK files can be accessed by using the standard Windows tools and a Source SDK application that is part of the Source SDK software package. It also contains multiple VPK files focused on specific tasks that are necessary for loading and managing content in the game.
There could be multiple reasons for which the system does not support given file. In the case of VPK extension, it is probable that none of the installed programs support given file type. Therefore, user should undertake the following steps
If an application that supports VPK files is installed on user’s system, but is not used to open such files by default, right-click on the file icon and choose "Open with" option from the menu. Next, select the proper application and check the "Always use the selected application to open this kind of files" box. The system will store this information in its registry and use the selected program to open files with VPK extension by default.
For Mac OS users the procedure is analogous – open the file menu by right-clicking on the VPK file and choose "Information" option and select "Open with program" option. From the submenu select an application and click on "Change all" button.
Inability to open VPK files may also be related to the lack of any application that supports given file being installed on the system. Should that be the case, user needs to download and install one of the following applications. Once installed, the system will automatically associate newly installed application with VPK files. If this step fails, see step 1.
Sometimes, although relatively rarely, steps 1 and 2 might not lead to expected results. There can be several reasons for such situation to occur: