Digimon World 2003. I never owned a PlayStation (was a Nintendo-only fanboy for years until I bought a PS2 in the mid-00s a year before the Xbox 360 was announced) and tried to run an emulator of it for over a decade before it was fully supported. I also had trouble because I found out the only English version that didn't have that stupid "once you start fighting the final boss, you can't explore the game world anymore" thing they used to do in JRPGs was the European version. Now I can actually play it, even using gameshark codes, easily... if I could only find the time to play it!