RAGens: Mega Drive/Genesis Emulator

RASnes9x: SNES Emulator

RAVBA: Gameboy/GBA Emulator

RANes: NES Emulator

RAProject64: N64 Emulator

RALibretro: multi-emulator

Source Code

The vast majority of the code for these emulators is GPL protected, and as such all source code for these emulators is GPL alike, and publically available at the following URL: https://github.com/RetroAchievements/RAEmus

Legal

RetroAchievements.org does not condone or supply any copyright-protected ROMs to be used in conjunction with the emulator supplied within. There are no copyright-protected ROMs available for download on RetroAchievements.org. It is illegal to possess any ROMs that you did not yourself make the backup copy of. RAGens is only for use with backup Mega Drive/Genesis ROMs that you legally own. RetroAchievements recommends the use of a Retrode to legitimately obtain backup ROM files of games you own. For more information, please see GameFAQs explanation or search the web to learn more.