Down in the sewer after you go under the stairs, walk Aya into the wall and keep her moving down. She will walk in to a room with three special items.
-At the lobby in Dryfield fill in the code # 3033 and press tota,l then you get the bronco master key.
-At the fire resistant safe fill in the code 4487 and you will get a bottle of holy water.
-The code for the floodgate is 18.
-The code for the moongate is 15.
-At the moongate you can chouse 2 ways. If you go through, you got Pierce's route (the bad ending). If you ignore it it will be Kyle's route (the good ending).
-This is a code you have to enter at the computer with the virus on and the code is a3eilm2s2y.