Luma3DS is a custom firmware for the Nintendo 3DS that removes factory restrictions to enable the execution of unsigned homebrew and game modifications. It functions as a kernel-level system extension that hooks system calls to bypass hardware limitations and introduce new operating system capabilities.
The project serves as a homebrew payload loader, using boot-time mechanisms to launch third-party software and custom firmware versions. It also provides a game modding framework capable of patching executable code and intercepting file requests to load custom assets and modified data.
The environment includes a hardware debugging suite for pausing processes and inspecting memory, alongside tools for legacy graphics upscaling. It further covers system customization through module extensibility, runtime state management via an overlay menu, and memory injection for game plugins and cheats.