# Battle Engine Aquila: a matching PC decompilation

> onslaught-decomp reconstructs Battle Engine Aquila's PC game code from a published GPL source release and retail executable evidence. It compiles C++ with Visual C++ 6.0 SP5 and compares function sections with BEA.exe; the author reports matches for 5,449 of 5,482 retail functions, with the remaining 33 tied to omitted DirectX sample files.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-07
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/dlprentice/onslaught-decomp>
- Primary source: <https://github.com/dlprentice/onslaught-decomp/blob/76e277d4145cef793b489de7702bf6b9d1c4e977/README.md>
- Catalog page: <https://awesomerea.org/resources/onslaught-decomp-case/>
- Record JSON: <https://awesomerea.org/resources/onslaught-decomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/onslaught-decomp-case/index.md)

## Requirements & limits

- **Prerequisites:** Own pinned BEA.exe and game folder, Visual C++ 6.0 SP5 Professional, and DirectX 9.0 SDK inputs.
- **Prerequisites:** Wine with 32-bit support, Python 3, llvm-undname, and GNU objdump.
- **Limits:** The full linked executable still requires unavailable inputs; function matching is documented separately.
- **License:** GPL-3.0; included third-party material retains its stated terms.

## Primary sources

1. <https://github.com/dlprentice/onslaught-decomp/blob/76e277d4145cef793b489de7702bf6b9d1c4e977/README.md>
2. <https://github.com/dlprentice/onslaught-decomp/blob/76e277d4145cef793b489de7702bf6b9d1c4e977/docs/check/README.md>

## More in Games

- [BattleTanx: an in-progress matching N64 decompilation](https://awesomerea.org/resources/battletanx-n64-decomp-case/index.md) · Case study
- [BattleTanx: Global Assault: matching PlayStation executable reconstruction](https://awesomerea.org/resources/battletanx-global-assault-ps1-case/index.md) · Case study
- [Beetle Adventure Racing!: a matching Nintendo 64 decompilation](https://awesomerea.org/resources/beetle-adventure-racing-decomp-case/index.md) · Case study
- [Berzerk: a commented Atari 2600 disassembly](https://awesomerea.org/resources/berzerk-atari-2600-disassembly-case/index.md) · Case study
- [Betrayal at Krondor: byte-exact source reconstruction](https://awesomerea.org/resources/betrayal-at-krondor/index.md) · Case study
- [BFM-decomp: Brave Fencer Musashi matching decompilation](https://awesomerea.org/resources/bfm-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.