# Lego Island 2: GBA decompilation > Lego Island 2 reconstructs the GBA game's code in C and assembly using bagd. Its documented workflow extracts assets from a user-provided baserom.gba with isle2-tool, generates build files with bagd and builds the ROM. - 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: - Primary source: - Catalog page: - Record JSON: - Chinese version: [简体中文](https://awesomerea.org/zh/resources/lego-island-2-gba-case/index.md) ## Requirements & limits - **Prerequisites:** Provide the GBA ROM as baserom.gba; building requires git, Rust, agbcc and arm-none-eabi tools. - **Limits:** Setup is mostly manual and undocumented. - **License:** No licence file in the repository. ## Primary sources 1. ## More in Games - [LEGO Racers: an N64 source reconstruction in progress](https://awesomerea.org/resources/lego-racers-case/index.md) · Case study - [LEGO Rock Raiders: a C and C++ decompilation project](https://awesomerea.org/resources/lego-rock-raiders-decompile-case/index.md) · Case study - [libmkb: reconstructing Super Monkey Ball 2 systems as a C++ library](https://awesomerea.org/resources/libmkb-case/index.md) · Case study - [LibreGrimrock: 64-bit reconstructions of the Legend of Grimrock engines](https://awesomerea.org/resources/libregrimrock-case/index.md) · Case study - [Little King's Story: a Wii decompilation project](https://awesomerea.org/resources/little-kings-story-decomp-case/index.md) · Case study - [Lufia II: portable semantic reconstruction of SNES game logic](https://awesomerea.org/resources/lufia2-semantic-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.