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.