BlueStacks is Android OS Emulator for Windows and Mac
This emulator is able to run almost every Android app. You can install apps directly from Play store. Your PC becomes almost like a tablet. You will be able to play almost all games and apps, which are available in Play store. However for 3D games you will need a pretty powerful computer, as it is for all emulators.
Download file to your computer, double click it and follow instructions to install.