# IsaacRecomp: translating Flash game bytecode to native C++

> Translates The Binding of Isaac’s Flash AVM1 bytecode into C++ functions and supplies a native rendering/input runtime. The project reads graphics and audio from the user’s original game and documents deterministic input, headless runs and screenshot regression checks.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-10-17
- Added to the catalog: 2026-10-17
- Original resource: <https://github.com/whylurking/IsaacRecomp>
- Primary source: <https://github.com/whylurking/IsaacRecomp/blob/7736f3d2961051b66cd315bcf5a719e9024d889d/README.md>
- Catalog page: <https://awesomerea.org/resources/isaacrecomp-case/>
- Record JSON: <https://awesomerea.org/resources/isaacrecomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/isaacrecomp-case/index.md)

## Requirements & limits

- **Prerequisites:** Requires the user’s original Steam Isaac.exe; Wrath of the Lamb and Eternal Edition depend on the corresponding game version. This is ahead-of-time translation, not recovery of the original authored ActionScript project.
- **Prerequisites:** Documented targets include 64-bit Windows/Linux, Android 7.0+ on 64-bit ARM and Switch homebrew. Source builds use CMake/Ninja and SDL2/OpenGL 3.3 or ES 3.0; mobile/console builds have separate SDK/toolchain requirements.
- **Testing evidence:** The author credits AI assistance and reports 30 Hz game logic with higher-rate interpolated rendering.
- **Testing evidence:** Reported regression tests compare deterministic logic and screenshots across engine revisions.
- **License:** MIT covers the authored engine, tools, build files and docs only. LICENSE explicitly excludes gen/, gen720/, patch1080/ and patch720/ translated game-code directories; third-party and original-game rights remain separate.

## Primary sources

1. <https://github.com/whylurking/IsaacRecomp/blob/7736f3d2961051b66cd315bcf5a719e9024d889d/README.md>
2. <https://github.com/whylurking/IsaacRecomp/blob/7736f3d2961051b66cd315bcf5a719e9024d889d/LICENSE>
3. <https://github.com/whylurking/IsaacRecomp/blob/7736f3d2961051b66cd315bcf5a719e9024d889d/CMakeLists.txt>
4. <https://github.com/whylurking/IsaacRecomp/blob/7736f3d2961051b66cd315bcf5a719e9024d889d/THIRD-PARTY-LICENSES.txt>

## More in Games

- [KartPad: platform integration for a Mario Kart Wii recompilation](https://awesomerea.org/resources/kartpad-case/index.md) · Case study
- [King Kong Recompiled: an AI-developed Xbox 360 static recompilation](https://awesomerea.org/resources/king-kong-recompiled-case/index.md) · Case study
- [LASRecomp: Link’s Awakening static recompilation](https://awesomerea.org/resources/lasrecomp/index.md) · Case study
- [Little Planet: Sonic CD recompiled from a matching disassembly](https://awesomerea.org/resources/little-planet-sonic-cd-recomp-case/index.md) · Case study
- [Lost Odyssey Recomp: statically recompiling an Xbox 360 RPG into native ports](https://awesomerea.org/resources/lost-odyssey-recomp-case/index.md) · Case study
- [MarioKart 64: Recompiled — a native port through N64Recomp static recompilation](https://awesomerea.org/resources/mariokart64-recompiled-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.