To get the code for the vault on the second floor of the Centennial building you must collect the projector slides from Room 200 and then play them in the video archive room (Room 207) to reveal the code (IX-VI-I). If you then turn the dials on the vault to the indicated number it will become unlocked: Dial 1: IX, Dial 2: VI, Dial 3: I.
Useless Trickets Trophy (Digging up the Past Sidequest)
Added 23 Apr 2012, ID #4632
Check out the video below to see the location of ALL the dig sites to complete the 'Digging up the Past' sidequest. The sidequest can only be done on a second playthrough of the game and you will need a shovel. Completing this sidequest also lets you get the special Ending E - 'Surprise!'. A map of Silent Hill can be found on a table just before you exit Devil's Pit (before you enter Silent Hill).
Return to the thief's apartment when you have completed the quest 'Stolen Goods'. Where the thief's corpse was hanging there will be a pile of discarded clothing. Press A on the clothing pile to switch between Murphy's standard outfit and a black hoodie with jeans.
Near the begining of the game when you reach the diner there is a cash register behind the bar area. If you take the coins out of it and place them in the jukebox in the corner of the room you will be able to hear the theme from the very first Silent Hill.
When you complete the following tasks during gameplay you will get the corresponding ending. To increase your morality, make good decisions and spare downed monsters. To decrease your morality, do the opposite.
Unlock Ending A: Spare Anne with good morality.
Unlock Ending B: Spare Anne with bad morality.
Unlock Ending C: Kill Anne with good morality.
Unlock Ending D: Kill Anne with bad morality.
Unlock Ending E: Let Anne kill you during the finale.
Unlock Ending F: Complete the game, then during your second playthrough, complete the 'Digging Up the Past' side quest.