Unpaker - Pak Files Unpack & Repack

Unpaker is a comprehensive C# library and Windows desktop application for reading, writing, and managing Unreal Engine 4 Pak archives, fully compatible with the GTA III, Vice City, and San Andreas Definitive Editions. Supporting Pak versions V0–V11, multiple compression algorithms (Zlib, Gzip, Oodle, Zstd, LZ4), AES-256 encryption, custom mount points, path hash seeds, and both GUI and CLI workflows, Unpaker provides a complete solution for extracting, creating, editing, and inspecting Pak files. With a modern dark UI, batch operations, real-time search, detailed metadata viewing, and a fully featured command-line tool, it’s the most powerful and developer-friendly Pak editor available for GTA DE modding and general UE4 archive manipulation.