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.UPK File Extension

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File TypeUnreal Engine 3 Package

DeveloperEpic Games
4.4 (34 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryGame Files


This file is saved in a binary format, which requires a specific program to read its contents.


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.

More Information

UPK files are used to load on-demand content while playing a game. They can be created and edited using the Unreal Development Kit (UDK).

Programs that open UPK files
Epic Games Unreal Tournament 3
Epic Games Unreal Development Kit
Updated 11/23/2011