You can easily configure the on-screen controls to your liking, which is convenient. For all you Duck Hunt fans, NES.emu also includes zapper/gun support, allowing users to touch the screen to fire and touch and hold outside the display area to simulate firing away from the screen. It includes features such as a 4-player option, save states and the ability to enter cheat codes (you'll need to supply them yourself).
unf format (compressed ZIP, RAR, or 7Z files will also work). You'll only need to supply your own game files, which can be in. You won’t need to delve into the plethora of settings unless you're an emulator expert who wants to tweak a few things otherwise, everything works fine right out of the box. The low audio and video latency is evident in the excellent gameplay experience. However, NES.emu's clean UI, minimal learning curve, and quick time to first play make it worthwhile. You'll have to shell out $4 for this open-source NES (Nintendo Entertainment System) emulator based on FCEUX it's not free.