Dr. Boogie: Sometimes when a game is ported from Japan, it loses something in the translation process. Maybe the story has to be rewritten, or the graphics changed because the publishers didn't think western audiences would get it. Other times, a game can remain largely unchanged, and still no one will get it because it never made any goddamn sense to begin with. Such is the story behind the 1990 NES game Zombie Nation, aka Samurai Zombie Nation, aka Attack of the Puking Head.