Kowloon's Gate is a 1996 PS1 first person adventure game produced by Sony Music Japan, released exclusively in the country. It features FMV cutscenes through a cyberpunk take of the historic Kowloon Walled City. The game was a hit in Japan, even sparking a real-life amusement complex recreated and modeled after the look of the game. 
An English trailer for the game surfaced, originating from Disc #94 of Ultra GamePlayers magazine, suggesting an English localization was planned.  In the Youtube comments of the same video, one user suggests he had read that as little as 20 to 30 copies were translated into English. The validity of the user's claims however are up in the air.
No English copies of Kowloon's Gates have ever surfaced.