I recently stumbled up this type of thing. My old Nintendo NES was sold long ago at a garage sale. http://www.virtualnes.com/ You can play just about all of the games online at the above website. If you want to play them offline then you need a NES Emulator for Windows and download the ROMs (game files). I use the VirtualNES Emulator (free), and download the ROMS for free from various sources. Plus, there are TONS of cheat codes for these games to let you do things you could NEVER do with the original console system. Check it out!