# OpenGT4: reimplementing Gran Turismo 4 for Windows

> OpenGT4 is a native Windows port of Gran Turismo 4, reimplemented in C. The tested disc is NTSC-U SCUS-97328 version 2.00. CORE.GT4 on that disc has SHA-1 30031137ce494323816bb707b90d3ec0d07937d2. The player selects a disc image in the launcher. The release files are OpenGT4-<version>-setup.exe and OpenGT4-<version>-win64.zip.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-07
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/MrGoodGuy2144/OpenGT4>
- Primary source: <https://github.com/MrGoodGuy2144/OpenGT4/blob/736124fd00c4b6e6728280c8109018bca726dae3/README.md>
- Catalog page: <https://awesomerea.org/resources/opengt4/>
- Record JSON: <https://awesomerea.org/resources/opengt4/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/opengt4/index.md)

## Requirements & limits

- Windows, Visual Studio 2022 Build Tools, and CMake. SDL2 and miniz are fetched by CMake. FFmpeg is used for the game's movies. Build with cmake -S . -B build -G "Visual Studio 17 2022", then cmake --build build --config Release --target opengt4.
- License: GNU GPL version 3. NOTICE adds section 7 terms: a derived work says Based on OpenGT4, and a modified version is marked as different from the original. ps2float from PCSX2 is LGPL-3.0-or-later.

## Primary sources

1. <https://github.com/MrGoodGuy2144/OpenGT4/blob/736124fd00c4b6e6728280c8109018bca726dae3/README.md>

## More in Games

- [OpenGTA2: rebuilding GTA2 from its game files](https://awesomerea.org/resources/opengta2-case/index.md) · Case study
- [OpenGuimo: GUIMO gameplay reimplemented in Godot](https://awesomerea.org/resources/openguimo-case/index.md) · Case study
- [openh4: reimplementing the Heroes of Might and Magic IV engine](https://awesomerea.org/resources/openh4-case/index.md) · Case study
- [OpenHoW: rebuilding Hogs of War from its game data](https://awesomerea.org/resources/openhow-hogs-of-war-case/index.md) · Case study
- [OpenIGI: a C# engine reimplementation for Project I.G.I. and I.G.I. 2](https://awesomerea.org/resources/openigi-engine-case/index.md) · Case study
- [OpenInsaniquarium: reimplementing Insaniquarium Deluxe](https://awesomerea.org/resources/openinsaniquarium-case/index.md) · Case study

## 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.