.PKG File Extension

Symbian OS is a discontinued operating system used on old mobile devices, such as Palm PDAs and Nokia, Ericsson, and Motorola phones. You will most likely encounter Symbian PKG files only if you have previously or are currently developing a Symbian OS application.

As part of building a Symbian application installer, Symbian developers must create a PKG file that defines many of the application's properties. When they're ready to build their installer, developers use CreateSIS's makesis command (or another SIS creation program) to load information from their PKG file and create a SIS file.

NOTE: The Nokia 808 PureView, released in 2012, was the last official Symbian OS device.

Since PKG files are plain text files, you can open and edit them in any text editor, such as Microsoft Notepad (Windows) or Apple TextEdit (Mac). If you cannot open your PKG file in a text editor, you likely have a different type of PKG file. Other file types, such as macOS Installers and PlayStation Store Download Packages, also use the .pkg extension.

The PlayStation Store allows PlayStation console owners to download purchased games and add-ons, as well as free demos, to their consoles. This content is saved in PKG files.

While most PlayStation owners will never have to manually view or manage their PKG files, some gamers distribute and download PKG files online. To use these files, you must transfer them to a compatible PlayStation console and install them. For example, if you have acquired a PKG file that contains a PS3 game, you must transfer that file to a PS3 and install it.

PlayStation Store PKG files must be transferred to an appropriate PlayStation device to be opened and installed. Often, gamers use homebrew applications to install PKG files they've downloaded online. In most cases, PKG files must be paired with an accompanying RAP file, which contains game licensing information.

You can use Apple Installer to install the app a PKG file contains. To do so, either double-click the PKG file, or right-click it and select Open With → Installer.

If you want to view the files your PKG file contains, refer to the How to check what files a PKG file contains section above.

Midtown Madness 2 is a popular open-world racing game that was developed by Angel Studios and published by Microsoft. It allows players to race through recreations of London and San Francisco in a variety of vehicles.

The 3D models MM2 uses to show vehicles and structures in-game are saved as PKG files. Like most of MM2's game assets, these files are saved in AR archives.

Most players will never see or need to open MM2's PKG files. However, MM2 modders may want to extract PKG files from MM2's game data archives, so they can view and edit the files' contents.

You can open a PKG file in Zanoza ZModeler (Windows), a 3D modeling app that specializes in opening video game vehicle models. Select File → Open... from the program's menu bar, and then navigate to and open your PKG file.

You can also open a PKG file in Blender (multiplatform) with the PKGImportExport add-on (linked below) installed.

After opening a PKG file in Zanoza ZModeler (Windows), you can export the model the file contains in the following common 3D model formats:

• .3DS - 3D Studio Scene
• .DAE - Digital Asset Exchange File
• .FBX - Autodesk FBX Interchange File
• .OBJ - Wavefront 3D Object File

You can also export the model in some game-specific formats, for use in those games.

Parametric Technology (PTC) CoCreate Modeling is a 3D CAD program that allows engineers and product designers to create 3D models. It was previously known as:

• CoCreate OneSpace Modeling
• OneSpace Designer Modeling
• SolidDesigner

It has since been replaced by Creo Elements/Direct Modeling.

CoCreate Modeling 2005 and later versions compress PKG files using proprietary or CPIO compression. CoCreate Modeling 2006 and later versions compress PKG files using Zip compression.

You can open a PKG file in CoCreate Modeling, Creo Elements/Direct Modeling, or Creo Elements/Direct Modeling Express (Windows). Express is free and can be downloaded from PTC's website.

If your PKG file is compressed using Zip compression, you can also decompress it using any Zip archive utility, to view the file's contents.

You can use Creo Elements/Direct Modeling to convert PKG files to the following 3D formats:

• .STL - Stereolithography File
• .WRL - VRML World
• .EASM - eDrawings Assembly

SmileBASIC is a program that allows developers to create BASIC programs on their Nintendo 3DS, Wii U, or Switch. Midori-OS is a mock operating system that SmileBASIC users can install to make creating and executing programs easier. For example, Midori-OS allows users to import and execute precompiled SmileBASIC applications. These applications are saved as PKG files. Midori-OS also allows users to create and load additional PKG files, housing their own SmileBASIC applications.

NOTE: The R-OS Forever and Sakakibara UI SmileBASIC mock operating systems can also load Midori-OS PKG files.

Midori-OS PKG files are meant to be loaded on a Nintendo video game console that has SmileBASIC and Midori-OS installed. They are not meant to be opened on a PC. It is unlikely that you will encounter a Midori-OS PKG file on a PC.

Roku TVs (and other Roku devices) use a proprietary operating system called Roku OS. Developers can create new channels for use on Roku OS, which allow Roku owners to select from and stream associated content.

After a developer finishes developing their Roku channel, they use the Roku Development Application Installer to package the channel's source code and assets as a PKG file. Developers can then either upload the channel to the Roku Channel Store as a beta channel, available to only specific testers, or a public channel, available to all Roku users.

Each PKG file is encrypted using a signing key stored on the Roku device used to create it. PKG files' contents are also typically compressed using Camfs or Squashfs.

PKG files are not meant to be opened. Instead, they are meant to be submitted to the Roku Channel Store, for beta testing or public use. Refer to Roku's official developer documentation for more information on how to create, publish, and install PKG files.