# Gran Turismo 2: reconstructing PS1 executables and overlays

> gt2-reversing reconstructs code for Gran Turismo 2's PlayStation release from the North American 1.2 simulation disc. Its build produces the SCUS_944.88 executable and six overlay executables from user-supplied originals, while the source tree contains C implementations, symbols and split configurations.

- 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/ginryuoku/gt2-reversing>
- Primary source: <https://github.com/ginryuoku/gt2-reversing/blob/2cfc94943c41fb87bc05ddcfe377187d001f3a7e/README.md>
- Catalog page: <https://awesomerea.org/resources/gt2-reversing-case/>
- Record JSON: <https://awesomerea.org/resources/gt2-reversing-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/gt2-reversing-case/index.md)

## Requirements & limits

- **Prerequisites:** A user-owned North American 1.2 simulation disc supplying SCUS_944.88 and GT2.OVL is required.
- **Prerequisites:** Building requires Linux, Python 3 with splat, MIPS-compatible binutils, Ninja and initialized submodules.
- **Limits:** The build currently supports US 1.2 only and does not reassemble a matching GT2.OVL archive.
- **License:** CC0-1.0 covers the project's work outside tools and include/*.asm; tools retain their own licenses, while the licenses of some included macros are unclear.

## Primary sources

1. <https://github.com/ginryuoku/gt2-reversing/blob/2cfc94943c41fb87bc05ddcfe377187d001f3a7e/README.md>

## More in Games

- [Gran Turismo 3: A-Spec: matching PS2 executable decompilation](https://awesomerea.org/resources/gt3-decomp-case/index.md) · Case study
- [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

## 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.