UPK File Documentation


Overview

FeatureValue
File Extension.upk
Full NameUnreal Engine 3 Package File
DeveloperEpic Games
File TypeBinary
MIME Typeapplication/octet-stream
Primary AssociationVideo Game Development
UsageStoring game assets like textures, models, maps
CompressionYes, proprietary
EncryptionOptional, proprietary
Contained FormatsVarious (e.g., .uasset for assets)
CompatibilityUnreal Engine 3 and some tools for Unreal Engine 4
EditableWith specific tools/software (e.g., UE3 Editor, UModel)
Archive StructureHierarchical
Asset TypesTextures, meshes, sounds, animations, etc.
IndexingContains a file header with indexes to assets
StreamingSupports streaming of assets for games
SerializationSupports efficient serialization for storage
Access MethodRandom access to individual assets within package
PlatformPlatform-independent with Unreal Engine compatibility
Header InformationIncludes metadata like version, number of assets
Used InGames and simulations developed with Unreal Engine 3
Encryption SupportGame-specific, can vary based on developer's implementation
Tool SupportVarious third-party tools for manipulation and extraction