# Geometry Dash: reconstructing Android game classes from ARM64 disassembly

> Reconstructs portions of Geometry Dash's Android C++ game classes from ARM64 disassembly, focusing on GameObject, GJBaseGameLayer, memory layouts, area movement, effects, and object state. The repository includes class source and headers and tracks unfinished vtable, trigger, and runtime behavior.

- 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/apersonwhomakesstuff/GD-2.2-Android-DECOMP>
- Primary source: <https://github.com/apersonwhomakesstuff/GD-2.2-Android-DECOMP/blob/5cedfc5f7b2ab3958aa0261382f05753662bf3ea/README.md>
- Catalog page: <https://awesomerea.org/resources/geometry-dash-android-class-reconstruction-case/>
- Record JSON: <https://awesomerea.org/resources/geometry-dash-android-class-reconstruction-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/geometry-dash-android-class-reconstruction-case/index.md)

## Requirements & limits

- **Prerequisites:** ARM64 disassembly analysis tools named by the project include IDA Pro 7.7+, Ghidra, Binary Ninja, and Frida.
- **Limits:** Complete vtable reconstruction and several effect and trigger behaviors remain unfinished.
- **License:** MIT License.

## Primary sources

1. <https://github.com/apersonwhomakesstuff/GD-2.2-Android-DECOMP/blob/5cedfc5f7b2ab3958aa0261382f05753662bf3ea/README.md>
2. <https://github.com/apersonwhomakesstuff/GD-2.2-Android-DECOMP/blob/5cedfc5f7b2ab3958aa0261382f05753662bf3ea/LICENSE>

## More in Games

- [Glover: an in-progress Nintendo 64 decompilation](https://awesomerea.org/resources/glover-n64-decomp-case/index.md) · Case study
- [Go Vacation: a halted Wii decompilation](https://awesomerea.org/resources/go-vacation-wii-case/index.md) · Case study
- [Goldeneye 007: a recompilable decompilation of three regional ROMs](https://awesomerea.org/resources/goldeneye-007-gitlab-decomp-case/index.md) · Case study
- [Graffiti Soul: mapping and testing Jet Set Radio Future functions](https://awesomerea.org/resources/graffiti-soul-jsrf-case/index.md) · Case study
- [Grand Prix 4 Decompilation: behavior-matched GP4.exe functions](https://awesomerea.org/resources/grand-prix-4-decomp-case/index.md) · Case study
- [Green Beret: a documented ZX Spectrum disassembly](https://awesomerea.org/resources/zx-spectrum-green-beret-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.