.UPK File Extension

Unreal Engine Package File

General Information

Title UPK File Extension
Extension .upk
Full Form Unreal Engine Package File
File Type Package File
Developer Epic Games
MIME Type application/octet-stream

File Function

Primary Function Game content storage
Additional Functions Data archiving, Asset bundling
Features Resource packaging, Game development

File Characteristics

Quality High, Game-ready
Supports Layers N/A
Supports Transparency Yes
Editable Yes

Use Cases

Game Development Yes
Mod Creation Yes
3D Modeling Limited

Security and Practices

Security Risks Malware injection
Best Practices File validation, Trusted sources

Historical/Version Information

Initial Release 1998
Latest Version Associated with Unreal Engine versions

Associated Types

Similar Extensions .umap, .uasset, .pak

Software Compatibility

Software Usage Policy OS Compatibility
Unreal Engine Free, Royalty after threshold Windows, Mac, Linux
UModel Free Windows
UnrealEd Free with Unreal Engine Windows, Mac, Linux