BioWare Aurora engine data
File type: Game file
A .hak file is a resource archive for games built with BioWare's Aurora engine. In Neverwinter Nights, it packages custom game resources for use by modules.
File type category:
Game file
Date updated: November 11, 2026
BioWare's Aurora engine uses .hak files to bundle multiple resources into a single archive. A module can use a HAK archive to supply custom game content, such as resources that extend or replace its available assets.
HAK files use BioWare's Encapsulated Resource File (ERF) format, which groups files so they can be handled as one unit, much like a ZIP, TAR, or RAR archive. Other BioWare Aurora files that use ERF include .erf, .mod, and .nwm.
BioWare's internal ERF Editor is a Windows tool for working with these archives.
Use BioWare's ERF Editor on Windows to inspect or extract a .hak archive. The Neverwinter Nights Toolset can use a HAK file as custom content for a module.
A .hak file is an archive, so conversion depends on its contents. To reuse them, extract the resources with BioWare's ERF Editor, then work with or convert each resource according to its own format.
Software applications that handle other tasks involving hak files:
Microsoft Windows
English
