The very first page of the Cave Noire manual reads: ‘For sale and use in Japan only. Export and sale of this product outside is prohibited’. So if I, as a hypothetical German-Japanese and Game Boy fan, had bought the module there on a holiday trip in 1991, the seller and myself would probably have been guilty of a criminal offence. Nowadays, I also download an – unofficial – language patch from the Internet without any guilty conscience. Konami: have mercy!