Hardest game I played on emulators was Megaman X4 IIRC, it was a bit hard to get used to doing stuff on the keyboard instead of the controller. The rest were all JRPGs or Project Diva, so I never had any real problems~ *still made sure to remap* Oh, and FF Dissidia I guess? Though that one is as easy as the JRPGs, not really hard to play on an emulator... Ah, SSB 64 too, but also easy to play on emulator~