UPK File Extension

UPK file icon
Unreal Engine 3 Package
  • Developer
    Epic Games
  • Category
  • Popularity
    2.8 (8 votes)

What is UPK file?

Users may create files that use the .UPK extension by using the Unreal Development Kit. This is a program related to the free gaming engine called Unreal Engine 3. The engine is best known for popular games such as Mass Effect and BioShock.

Files with this extension serve as a container to keep the necessary content used in games. You can load them while playing, and they can include a variety of data. The information they hold can be meshes used by the game, maps, music, 3D models, and game settings. In addition, users can use them to save textures, as well as game rules and other files.

Programs which support UPK file extension

The following listing features UPK-compatible programs. Files with UPK suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.

Programs that support UPK file

How to open file with UPK extension?

Problems with accessing UPK may be due to various reasons. What is important, all common issues related to files with UPK extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Download and install Unreal Tournament 3

Problems with opening and working with UPK files are most probably having to do with no proper software compatible with UPK files being present on your machine. The most obvious solution is to download and install Unreal Tournament 3 or one to the listed programs: Mass Effect, Unreal Development Kit, Gears of War. Above you will find a complete listing of programs that support UPK files, classified according to system platforms for which they are available. One of the most risk-free method of downloading software is using links provided by official distributors. Visit Unreal Tournament 3 website and download the installer.

Step 2. Verify the you have the latest version of Unreal Tournament 3

If the problems with opening UPK files still occur even after installing Unreal Tournament 3, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of Unreal Tournament 3 is available. Software developers may implement support for more modern file formats in updated versions of their products. The reason that Unreal Tournament 3 cannot handle files with UPK may be that the software is outdated. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using Unreal Tournament 3.

Step 3. Set the default application to open UPK files to Unreal Tournament 3

If the issue has not been solved in the previous step, you should associate UPK files with latest version of Unreal Tournament 3 you have installed on your device. The next step should pose no problems. The procedure is straightforward and largely system-independent

The procedure to change the default program in Windows

  • Choose the Open with entry from the file menu accessed by right-mouse clicking on the UPK file
  • Click Choose another app and then select More apps option
  • Finally select Look for another app on this PC, point to the folder where Unreal Tournament 3 is installed, check the Always use this app to open UPK files box and conform your selection by clicking OK button

The procedure to change the default program in Mac OS

  • From the drop-down menu, accessed by clicking the file with UPK extension, select Information
  • Find the Open with option – click the title if its hidden
  • From the list choose the appropriate program and confirm by clicking Change for all....
  • If you followed the previous steps a message should appear: This change will be applied to all files with UPK extension. Next, click the Continue button to finalize the process.

Step 4. Check the UPK for errors

You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper UPK file. Problems with opening the file may arise due to various reasons.

1. Verify that the UPK in question is not infected with a computer virus

If the file is infected, the malware that resides in the UPK file hinders attempts to open it. Scan the UPK file as well as your computer for malware or viruses. If the scanner detected that the UPK file is unsafe, proceed as instructed by the antivirus program to neutralize the threat.

2. Verify that the UPK file’s structure is intact

Did you receive the UPK file in question from a different person? Ask him/her to send it one more time. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. If the UPK file has been downloaded from the internet only partially, try to redownload it.

3. Check if the user that you are logged as has administrative privileges.

Some files require elevated access rights to open them. Log out of your current account and log in to an account with sufficient access privileges. Then open the Unreal Engine 3 Package file.

4. Verify that your device fulfills the requirements to be able to open Unreal Tournament 3

If the systems has insufficient resources to open UPK files, try closing all currently running applications and try again.

5. Verify that your operating system and drivers are up to date

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Unreal Engine 3 Package files. It may be the case that the UPK files work properly with updated software that addresses some system bugs.

Do you want to help?

If you have additional information about the UPK file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on UPK file.

Top File Extensions
Show more
File Extension of the day
jpeg icon


JPEG Image

JPEG file extension is commonly associated with image files, and is one the most popular graphic formats currently in use. It uses lossy compressio...