If you don't have a PS2 you will need PCSX2 which is a PS2 emulator for the PC. On your Shield, you can either setup PCSX2 to run directly from GeForce Experience, or you can add the executable to Steam. Some people have issues getting the controller to work but I haven't had any issues. I'll add a how to video to get this emulator running in the very near future. Check out the video below to see Here Comes the Pain in action. Til next time!