JGenesis to emulator szereg konsol do gier 8-bitowych i 16-bitowych. Udaje Sega Genesis / Mega Drive, Sega CD / Mega CD, Sega Master System / Mark III, Game Gear, Nintendo Entertainment System (NES) / Famicom, Super Nintendo Entertainment System (SNES) / Super Famicom, Game Boy / Game Boy Color i Sega 32X / Mega 32X.