Clock Tower on the PlayStation is the second game of the series, but the first to make it across the Pacific. Its localization was likely due to the success of the first Resident Evil, which was released the year before.
Despite its creepy, foreboding atmosphere and terrifying antagonist, Clock Tower didn't wow critics when it came out in 1997, but it had the kind of scares horror fans loved, making it a much-revered cult classic.
Clock Tower became one of the PlayStation's sleeper games and eventually became (very) hard to find. A collector looking to complete their horror collection today will need to put up some big bucks as a sealed copy of the game went for $500 in September.