# Silent Hill: matching PlayStation decompilation of the executable and overlays

> Reconstructs Silent Hill’s PlayStation code, the main executable plus its engine, screen and map overlays, as C that rebuilds byte-identical binaries from the user’s own NTSC-U 1.1 disc image. The project focuses on matching and naming. decomp.dev reports every function matched for the pinned commit, while data migration, shiftable builds and documentation remain open.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-10-18
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/shdecompilations/silent-hill-decomp>
- Primary source: <https://github.com/shdecompilations/silent-hill-decomp/blob/73a9f176fa04a0268c5dc0263ba35b1fe23498b8/README.md>
- Catalog page: <https://awesomerea.org/resources/silent-hill-decomp-case/>
- Record JSON: <https://awesomerea.org/resources/silent-hill-decomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/silent-hill-decomp-case/index.md)

## Requirements & limits

- Target NTSC-U 1.1 (SLUS-00707); configurations also cover PAL 1.0 and three NTSC-J releases. The output is the PlayStation executable and overlays; the codebase is not port-ready.
- Supply a personal NTSC-U 1.1 disc dump as one .BIN with the setup guide SHA-1 under rom/image. The repository includes some Sony PsyQ 4.3/4.4 library objects and prebuilt compiler and ISO tools.
- The Make build uses Linux or WSL2, git, build-essential, MIPS binutils and cpp, Python 3, bchunk, 7z and recursive submodules. Native Windows Ninja builds are reported to mismatch.
- The build compares SHA-256 hashes for the executable and overlays; the project reports 6,527 of 6,527 functions matched and 36.99% of data matched.
- Project code is GPLv3; the game data and Sony SDK objects retain separate rights.

## Primary sources

1. <https://github.com/shdecompilations/silent-hill-decomp/blob/73a9f176fa04a0268c5dc0263ba35b1fe23498b8/README.md>
2. <https://github.com/shdecompilations/silent-hill-decomp/blob/73a9f176fa04a0268c5dc0263ba35b1fe23498b8/LICENSE>
3. <https://github.com/shdecompilations/silent-hill-decomp/blob/73a9f176fa04a0268c5dc0263ba35b1fe23498b8/lib/versions.txt>
4. <https://github.com/shdecompilations/silent-hill-decomp/blob/73a9f176fa04a0268c5dc0263ba35b1fe23498b8/configs/USA/checksum.sha>
5. <https://github.com/shdecompilations/silent-hill-decomp/blob/73a9f176fa04a0268c5dc0263ba35b1fe23498b8/.github/workflows/check.yml>
6. <https://github.com/shdecompilations/silent-hill-decomp/blob/73a9f176fa04a0268c5dc0263ba35b1fe23498b8/.gitmodules>
7. <https://github.com/shdecompilations/silent-hill-decomp/blob/73a9f176fa04a0268c5dc0263ba35b1fe23498b8/Makefile>
8. <https://github.com/shdecompilations/silent-hill-decomp/actions/runs/39120072732>
9. <https://github.com/shdecompilations/silent-hill-decomp/wiki/Setup/8e17f29b6e88a5fc0dfaa5be427211fae2f76ddf>
10. <https://decomp.dev/shdecompilations/silent-hill-decomp>

## More in Games

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- [SkiesOfArcadiaLegends-Decomp: Skies of Arcadia Legends GameCube decompilation by ogdanimal](https://awesomerea.org/resources/skies-of-arcadia-legends-decomp-ogdanimal-case/index.md) · Case study
- [Skyward Sword: Wii decompilation with hash-checked relinking](https://awesomerea.org/resources/skyward-sword-decomp-case/index.md) · Case study
- [Sly 2: Band of Thieves: a matching PS2 decompilation](https://awesomerea.org/resources/sly-2-matching-decomp-case/index.md) · Case study
- [Sly Cooper and the Thievius Raccoonus: matching PlayStation 2 decompilation](https://awesomerea.org/resources/sly1-matching-decomp-case/index.md) · Case study
- [SMW NES Disassembly: disassembling the Famicom Super Mario World port](https://awesomerea.org/resources/smw-nes-disassembly-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.