A video game emulator is software that allows a computer or other device to mimic the hardware of a specific gaming console, enabling users to play games designed for that console. Emulators recreate the original system's environment, allowing games to run as if they were on their native platform, such as the Nintendo Entertainment System or Sega Genesis. Emulators often require game files, known as ROMs, which contain the data from the original games. While emulators can enhance gaming experiences with features like improved graphics and save states, the legality of using ROMs varies, depending on copyright laws and ownership of the original games.