Thanks to everyone who entered the Silent Hill Origins competition!
I can confirm that the correct answer was 16 November 2007.
1st Prize: Nick Q. (Nyarlathotep)
2nd Prize: Alyssa H.
3rd Prize: Dennis T. (Numb Body01)
(* Surnames and other entries have been blurred to preserve privacy).
Congratulations to the winners! Winners were notified 18 December via email and the forum. Prizes have been posted out.