Hi! This is a game for the NES/Famicom 8-bit consoles. You can play it on Windows, but you need an emulator, a type of software that can be used to run software from other systems. In this particular case, for Windows, we recommend to use FCEUX. You can download it for free here: http://www.fceux.com. With FCEUX you can open the file whatremain.nes and start playing! More instructions to configure the emulator can be found on their site.