Nestopia is an open-source emulator designed to replicate the experience of playing games from the Nintendo Entertainment System (NES). It allows users to play classic NES games on modern devices, providing features like save states, customizable controls, and graphical enhancements. The emulator supports a wide range of NES game files, making it accessible for both casual gamers and retro enthusiasts. With its user-friendly interface, Nestopia aims to preserve the nostalgia of 8-bit gaming while ensuring compatibility with various operating systems, including Windows, macOS, and Linux.