# OpenApe: reconstructing the Call of Duty 4 Asset Manager

> OpenApe reimplements the Call of Duty 4 mod tools' asset_manager.exe as a C++20 desktop editor. The author attributes its format knowledge to machine-assisted analysis of decompiled binaries. It reads GDF definitions and GDT game data, and previews models, animations and materials using the game's compiled shaders.

- Type: Case study
- Targets: App
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/Rex109/OpenApe>
- Primary source: <https://github.com/Rex109/OpenApe/blob/628cc1208a2eeba7bf62ccef0d841d0ebac480a2/README.md>
- Catalog page: <https://awesomerea.org/resources/openape-case/>
- Record JSON: <https://awesomerea.org/resources/openape-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/openape-case/index.md)

## Requirements & limits

- Building requires Visual Studio 2022 or 2026 with the C++ toolset and Windows SDK.
- Editing requires a Call of Duty 4 project tree with deffiles and GDT files in source_data or the folders listed in bin\converter_gdt_dirs_0.txt.
- MIT licence.

## Primary sources

1. <https://github.com/Rex109/OpenApe/blob/628cc1208a2eeba7bf62ccef0d841d0ebac480a2/README.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.