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Basic information about UPK file

When there is a problem with opening files with the file extension UPK（*.UPK or *.upk）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the UPK file yourself.

There are 1 file types using the UPK file extension in our database. In the further part of this page, you will find detail information about all the UPK file with their brief description and a list of programs that support UPK file sorted by operating systems. The table below provides useful information about the UPK file extension. It answers questions such as:
  • What is the UPK file?
  • How to open a UPK file?
  • What programs do I need to open a UPK file?
  • What programs help to create and edit a UPK file?
  • How to convert UPK files to another file format?
  • How to convert another files to UPK file format?


1.Detail information about UPK file extension: Unreal Engine 3 Package

File type Unreal Engine 3 Package Category Game Files
Developer Epic Games File format Binary
Description UPK file is a Unreal Engine 3 Package developed by Epic Games. File used by Unreal Engine 3, a free gaming engine used to develop popular games such as Unreal Tournament 3, Mass Effect, Mirror's Edge, and BioShock; serves as a file container which includes various types of game files; may contain 3D models, textures, maps, music files, game settings, and other files.
Software programs that will open, edit or convert UPK files

Windows		 Epic Games Unreal Tournament 3
Epic Games Unreal Development Kit
Gears of War
Mass Effect



Can't open a UPK file?

When you click a file to open it, operating system examines the filename extension. If operating system recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When operating system does not recognize a filename extension, you receive the following message:

”Can't open this file: example.UPK”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the UPK extension without any issue.


Where I can download the application that support UPK file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of UPK files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a UPK file?

The reasons for the lack of the ability to open a UPK file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a UPK file. If there is still something wrong, you might want to check:

  • Whether the UPK file is damaged.
  • Whether the UPK file is incorrectly linked in the registry entries.
  • Whether the UPK file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the UPK file format is incompletely.
  • Whether the UPK file is infected.
  • Whether the drivers of the equipment used for opening a UPK file are up to date.
  • Whether your computer has enough hardware resources to open a UPK file.

If the UPK file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.