# GT Advance 3: matching GBA ROM reconstruction

> GT Advance 3 reconstructs the US Game Boy Advance ROM from C, assembly and registered data generators. The author reports an 8 MiB byte-identical build and tracks compiler-generated C matches separately from assembly-backed functions and preserved data payloads.

- 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/722rsr/gtadv3-decomp>
- Primary source: <https://github.com/722rsr/gtadv3-decomp/blob/76ef122a22c5b6c59fa49852a0bbe56e5d9ea70f/README.md>
- Catalog page: <https://awesomerea.org/resources/gt-advance-3-decomp-case/>
- Record JSON: <https://awesomerea.org/resources/gt-advance-3-decomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/gt-advance-3-decomp-case/index.md)

## Requirements & limits

- **Prerequisites:** Python 3.11+, GNU Make, Git, a host C/C++ compiler, Clang, ARM GCC/binutils, shasum and pyelftools are required for the documented build.
- **Prerequisites:** A user-owned US ROM named baserom.gba is required for comparison.
- **Limits:** Some functions remain assembly-backed, and some data payloads are preserved or extracted from the reference ROM.
- **License:** CC0-1.0 applies to the project's reconstruction, tooling and documentation.

## Primary sources

1. <https://github.com/722rsr/gtadv3-decomp/blob/76ef122a22c5b6c59fa49852a0bbe56e5d9ea70f/README.md>
2. <https://github.com/722rsr/gtadv3-decomp/blob/76ef122a22c5b6c59fa49852a0bbe56e5d9ea70f/LICENSE>

## More in Games

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- [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
- [Hamtaro: Ham-Ham Heartbreak: a matching GBA decompilation](https://awesomerea.org/resources/hamtaro-heartbreak-decomp-case/index.md) · Case study
- [Harry Potter and the Half-Blood Prince: function-level Windows decompilation](https://awesomerea.org/resources/harry-potter-half-blood-prince-decomp-case/index.md) · Case study
- [Harry Potter and the Sorcerer's Stone: a GBC disassembly](https://awesomerea.org/resources/hpss-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.