# Gran Turismo 3: A-Spec: matching PS2 executable decompilation

> gt3-decomp reconstructs C and C++ for Gran Turismo 3: A-Spec's PS2 CORE.GT3 executable, NTSC-U v1.00. It compiles functions with the original ee-gcc toolchain, checks instructions per function, and SHA-1-compares a full build that combines matched source with disassembly from the user's executable; the author reports partial matching progress.

- Type: Case study
- Targets: Game
- 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/gustavocanepa/gt3-decomp>
- Primary source: <https://github.com/gustavocanepa/gt3-decomp/blob/ccec99c5b5e67ad9df9a877328ca195be5d421e7/README.md>
- Catalog page: <https://awesomerea.org/resources/gt3-decomp-case/>
- Record JSON: <https://awesomerea.org/resources/gt3-decomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/gt3-decomp-case/index.md)

## Requirements & limits

- **Prerequisites:** A personal copy of the NTSC-U v1.00 game disc is required.
- **Prerequisites:** Linux or WSL and Python 3.11 or later with rabbitizer are required.
- **Limits:** The author reports 3,557 of 11,407 functions matching at the cited October 2026 progress point.
- **License:** MIT license.

## Primary sources

1. <https://github.com/gustavocanepa/gt3-decomp/blob/ccec99c5b5e67ad9df9a877328ca195be5d421e7/README.md>
2. <https://github.com/gustavocanepa/gt3-decomp/blob/ccec99c5b5e67ad9df9a877328ca195be5d421e7/orig/README.md>

## More in Games

- [Gran Turismo 4: an agent-assisted PS2 engine matching decompilation](https://awesomerea.org/resources/gran-turismo-4-matching-decomp-case/index.md) · Case study
- [Greenwood: a matching Robin Hood decompilation](https://awesomerea.org/resources/greenwood-robin-hood-decomp-case/index.md) · Case study
- [GT Advance 3: matching GBA ROM reconstruction](https://awesomerea.org/resources/gt-advance-3-decomp-case/index.md) · Case study
- [Guild Rebrew: C89 reconstruction of Europa 1400 binaries](https://awesomerea.org/resources/guild-rebrew-europa-1400-case/index.md) · Case study
- [GX Spirit Caller Decomp: a three-region matching DS reconstruction](https://awesomerea.org/resources/gx-spirit-caller-decomp-case/index.md) · Case study
- [Halo 2: an agent-assisted matching decompilation of an LTCG Xbox build](https://awesomerea.org/resources/halo2-matching-decomp-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.