Once you execute the app, your PC will give you a Warning saying that this app is unsafe and could have malware in it. It says this because it is run by an unknown publisher to the computer.An unknown publisher security warning is a pop-up message that you see when you try to install software that is created by an unknown publisher or creator All you need to do is click More info and run app And the PC will trust that you know what you're doing and will let you play the game.