Case study

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.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-07
Evidence class: C2 code & docs, no demo or download

Stars: 32
Last commit: 2026-10-13
Language: C
License (GitHub): GPL-3.0

GitHub data as of 2026-11-10

Copy as Markdown View JSON Cite

Evidence

Observed: Code and documentation observed; no download method or demo found.
Checked: 2026-11-09

How evidence classes are assigned

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.

Cite

BibTeX

@misc{opengt4,
  title = {{OpenGT4: reimplementing Gran Turismo 4 for Windows}},
  howpublished = {\url{https://github.com/MrGoodGuy2144/OpenGT4}},
  url = {https://github.com/MrGoodGuy2144/OpenGT4},
  urldate = {2026-11-07},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/opengt4/}}
}

Plain text

OpenGT4: reimplementing Gran Turismo 4 for Windows. https://github.com/MrGoodGuy2144/OpenGT4 (accessed 2026-11-07). Awesome REA entry: https://awesomerea.org/resources/opengt4/

Useful? Star Awesome REA on GitHub2.4k

About this entry

The description was reviewed against primary sources.

Report an outdated entry Suggest a translation fix

Primary sources

README.md GitHub · MrGoodGuy2144/OpenGT4 · Revision 736124f