RetroArch vs RustBoyAdvance-NG

RetroArch is a frontend for emulators, game engines, and media players, bringing them under a unified settings system. The RetroArch/Libretro project includes more than 200 cores across those categories. Its menu can group scanned games by system and display thumbnails and animated backgrounds. Common game controllers configure automatically when plugged in, and button actions can also be assigned manually.

Stackable shaders can change rendered graphics or imitate the look of CRT monitors. Built-in netplay supports hosting or joining network gaming sessions, including spectator mode. RetroArch can record gameplay to video files and stream games to Twitch or YouTube. Versions are listed for Windows, Linux, Android, iOS, macOS, and web browsers. RetroArch is free and open source under GPL version 3; the libretro API uses an MIT license. Features differ by platform and store version: the browser edition has lower performance and fewer capabilities than the full version, while Steam lacks Core Updater and thumbnail scraping and offers a selected core set.

RustBoyAdvance-NG is a free Nintendo Game Boy Advance emulator and debugger written in Rust. Its WebAssembly demo accepts ROM files by drag and drop, while the desktop emulator loads ROM files or ZIP archives containing .gba files. Desktop use requires a GBA BIOS binary; the project says an open-source BIOS is supported. The repository lists SDL2 and minifb desktop frontends, with minifb marked as unmaintained, plus Java JNI bindings and a terminal frontend. A proof-of-concept Android application can be opened in Android Studio and requires Rust Android targets with the NDK. The custom debugger and experimental GDB server are gated behind build features. Desktop key commands include saving and loading snapshot files, but controls cannot currently be reconfigured. Desktop builds require Rust 1.51 or later and SDL2 dependencies on Linux and macOS. The project identifies CGB audio, including four wave-generator channels, as remaining emulation work. It is distributed under the MIT License and lists Linux, macOS, Windows, web, and Android platforms.