OpenAssetTools

Spec sheet

Purpose

OpenAssetTools is a work-in-progress modding tool suite for older Call of Duty titles.Read 9 Oct 2026 · openassettools.dev

License

The source code is licensed under GPLv3.Read 8 Oct 2026 · openassettools.dev

Affiliation

The project states that it is not endorsed by or affiliated with Activision, Treyarch, Infinity Ward, or their descendants.Read 9 Oct 2026 · openassettools.dev

Asset creation

The site says users can create custom assets and mods for supported games.Read 8 Oct 2026 · openassettools.dev

Asset extraction

The Unlinker loads supported games’ fastfiles and can dump a subset of their assets to disk, depending on the game.Read 8 Oct 2026 · openassettools.dev

Asset formats

Unlinker dumps assets in formats intended to be close to the original game formats or in commonly used formats.Read 9 Oct 2026 · openassettools.dev

Build requirements

Building requires Git and Premake; the Windows guide specifies Visual Studio 2022, while the Linux guide specifies g++ and multilib for 32-bit builds.Read 9 Oct 2026 · openassettools.dev

Command line

The Linker and Unlinker both provide command-line usage, and the Unlinker can also be used by dragging and dropping a fastfile onto it on Windows.Read 8 Oct 2026 · openassettools.dev

Compatibility

The project aims to be compatible with existing formats and add support for previously unsupported titles.Read 8 Oct 2026 · openassettools.dev

Create fastfiles

The Linker builds custom fastfiles and can reuse assets loaded from existing zones.Read 9 Oct 2026 · openassettools.dev

Extract assets

The Unlinker can load supported fastfiles and dump a subset of their assets to disk, depending on the game.Read 9 Oct 2026 · openassettools.dev

Fastfile building

The Linker builds custom fastfiles and can reuse assets loaded from existing zones, although disk-readable asset types vary by game.Read 8 Oct 2026 · openassettools.dev

Legal note

The site says extracting game files does not grant rights to their contents, which remain with their respective owners.Read 8 Oct 2026 · openassettools.dev

Legal rights

The guide says extracting game file contents does not grant rights to those contents, which remain with their owners.Read 9 Oct 2026 · openassettools.dev

Limits

The project is incomplete; only a subset of assets can currently be dumped or read from disk, depending on the game.Read 9 Oct 2026 · openassettools.dev

Linux build

Building on Linux requires Git and g++, with multilib needed for 32-bit builds on a 64-bit machine.Read 8 Oct 2026 · openassettools.dev

Linux use

The Linux build guide uses generate.sh to create make files, followed by make or the provided release or debug scripts.Read 9 Oct 2026 · openassettools.dev

Project files

Zone project files are text-based and use comma-separated key-based notation with optional comments and C-like preprocessing.Read 9 Oct 2026 · openassettools.dev

Project limits

The guide describes OAT as incomplete and says it currently provides only a small subset of modding features.Read 8 Oct 2026 · openassettools.dev

Source license

The OAT source code is licensed under GPLv3.Read 9 Oct 2026 · openassettools.dev

Standalone operation

The Unlinker works standalone, and the homepage says running the game is not necessary to use the toolset.Read 9 Oct 2026 · openassettools.dev

Standalone use

The Unlinker works standalone, and the home page says running the game is not necessary.Read 8 Oct 2026 · openassettools.dev

Supported games

It currently supports the PC versions of Call of Duty 4: Modern Warfare, Modern Warfare 2, Modern Warfare 3, Black Ops, and Black Ops II, with varying progress across games.Read 9 Oct 2026 · openassettools.dev

Windows build

Building on Windows requires Git and Visual Studio 2022 according to the getting-started guide.Read 8 Oct 2026 · openassettools.dev

Windows use

On Windows, a fastfile can be dragged and dropped onto Unlinker to run it with the fastfile path.Read 9 Oct 2026 · openassettools.dev

Where Specifiction places it

• Game Modding Tools#17 of 257.3