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 recreate the original hardware's environment, making it possible to run games that would otherwise be inaccessible. Emulators often come with additional features, such as save states, enhanced graphics, and customizable controls, improving the gaming experience. They can support various gaming consoles, including Sega, Sony PlayStation, and Microsoft Xbox, allowing gamers to revisit their favorite titles from different eras.