A game emulator is software that allows one computer system to mimic the functions of another, enabling users to play video games designed for different platforms. For example, a Nintendo game emulator can let players enjoy classic Nintendo games on a PC or smartphone. Emulators work by replicating the hardware and software environment of the original gaming console, translating its instructions into a format that the host system can understand. This technology has made it possible for gamers to access a vast library of retro games, preserving gaming history and providing new ways to experience beloved titles.