Zero work isn't quite a fair assessment. There's NRE associated with implementing the emulator, and probably a fair amount of play testing. Games might have spe

Zero work isn't quite a fair assessment. There's NRE associated with implementing the emulator, and probably a fair amount of play testing. Games might have specific quirks that depend on the hardware implementation. As anyone who's ever done emulation on a PC knows, it's can be very good, but rarely perfect.