GT4Recomp (Gran Turismo 4 PC port)

Gran Turismo 4, Polyphony Digital’s 2004 driving simulator, only came out on PlayStation 2, and Sony has never ported it. In September and October 2026 several projects took it on at once, helped along by AI coding tools and a new generation of PS2 recompilers. GT4Recomp was the first to reach a playable release, on 21 October 2026, and Generation Amiga and GameGPU covered it within days. On 27 October 2026 it had about 330 GitHub stars.

This site is not affiliated with any of these projects, with Polyphony Digital or with Sony.

The GT4 PC projects compared

The three projects help each other: GT4Recomp credits gt4-decomp for the game’s function names and class layouts. gt4-decomp says most of its matching was done by AI agents (Anthropic’s Claude), and GT4Recomp’s README says donations pay for AI development tools.

GT4Recomp: what it is

• The game’s code, compiled ahead of time: the PS2’s main processor code is translated into C++ and compiled for x86-64, and every one of the game’s 2,048 VU1 microprogram entry points and 14 VU0 microprograms is compiled offline too, with no interpreter on the normal path.
• PS2 hardware still modelled: the runtime comes from ps2-web-recomp by snuri00, which reproduces the PS2’s other chips in software. The README calls it a “hybrid recompilation” and says it doesn’t claim zero emulation.
• Graphics through GSdx: drawing is done by a fork of PCSX2’s GS renderer (GSdx, GPL-3.0) running as a separate process, with Vulkan. The project’s own renderer, CoreGS 2.0, is in development for version 2.0.
• An installer and launcher: since 1.2.1 a one-click installer and a launcher set the game up from your disc image and handle settings, saves, controller mapping and updates.

GT4Recomp: current status

What the README lists:

• a locked 60 FPS at 100% game speed in every scene the developer tests (Time Trial and an Arcade race on the Nordschleife, a night race, Rally at Grand Canyon and the car showroom), on a Ryzen 7 5700X with a Radeon RX 9060 XT; the first native build ran at 30 FPS and half speed;
• rendering at 1080p by default, with 1440p, 4K and 8K, borderless fullscreen and a render scale of 50 to 200%;
• ultrawide and any aspect ratio (21:9, 32:9, 16:10) since 1.1.0, with the HUD kept 16:9 in the middle;
• custom texture packs from the PCSX2 community, and a crash-safe memory card;
• any SDL3 controller and a keyboard layout; RetroAchievements since 1.2.4.

Known problems per the README: some license demos and menu backgrounds don’t play (every license test does), racing wheels are not supported yet, long sessions are not fully tested, and most testing was on AMD graphics. The installer is not code-signed, so Windows SmartScreen warns on the first start. In the issue tracker on 27 October 2026, players reported crashes at start, heavy slowdown on integrated and low-end GPUs, and crashes when importing PCSX2 saves. We didn’t play it ourselves.

What you need

• Your own disc image of Gran Turismo 4, USA v2.00 (SCUS-97328), as a plain .iso. Other regions are not supported. We don’t explain how to obtain game files.
• Windows 10 or 11, 64-bit, a CPU with SSE4.1, a GPU with Vulkan 1.2 and current drivers.
• About 6 GB free: the launcher keeps a 5.3 GB copy of your disc image next to the program.

How to install (overview)

From the README, at a high level: download GT4Recomp-Setup from the official Releases page, run it (click past the SmartScreen warning if you trust it), then point the launcher at your disc image. The launcher downloads the GSdx renderer on its own. Settings, saves and replays are kept in %APPDATA%\GT4Recomp.

What’s in the download

GT4Recomp’s installer contains the precompiled game program: Gran Turismo 4’s own code, translated ahead of time. Your disc image supplies the game’s data (cars, tracks, sound and video). The repository itself contains no game files, disc images, BIOS or saves. We don’t link the files.

Is it official, and will it stay up?

• No. All three are unofficial fan projects, not affiliated with or endorsed by Sony Interactive Entertainment or Polyphony Digital.
• We found no takedown. On 27 October 2026 GitHub’s public DMCA archive had no notice naming these projects. Kaezzey’s original gt4-staticrecomp repository is gone (404), with no notice we could find.
• Get it only from the official repository. Other GitHub repositories with GT4 names were empty or a single file when we checked, and one, OpenGT4, claims a playable C reimplementation but has no release; we don’t link it. Any site offering “Gran Turismo 4 PC download” with the game included is not this project.

Related

• Gran Turismo Sport on PC (RyGT): the PS4 Gran Turismo, running natively on Windows.
• NFS Underground 2 in the browser, Burnout 3 and Midnight Club 3: other 2000s racers running on PC.

Unofficial. This page is written by an independent directory. It is not made by, endorsed by or affiliated with Sony Computer Entertainment (developed by Polyphony Digital) or João Alano (moesuito) and GT4Recomp contributors (GT4Recomp (Gran Turismo 4 PC port)'s author). We do not host any files, and we never link to game files, ROMs or ISOs.