RetroArch is a multi-system emulator that allows a user to play all sorts of retro games on their computer. It can emulate a large number of retro video game systems including Nintendo, PlayStation, Xbox etc., and it does so using a nice all-in-one interface. RetroArch comes with a dazzling array of different options so that it is particularly suitable for people who like to tweak everything to suit their own specific requirements, for the perfect retro gameplay experience. Once it's set up it is very simple to use.