CNSD, THE GAME!
For most of the time this is exploration mission. I'm not grabbing Holy Water until I get all loot. In Building B there is nun zombie. She's very sensitive. If she's looking in your direction, then don't move even if you are in shadow. Also crouch walk. I doused couple of gas torches near stairs. Sometimes it may alert zombie. Also don't shoot arrows if enemy is looking at you, because they can go into search mode.
After getting all loot I doused 2 torches in Church near altar and grabbed Holy Water. Then I sneaked to Underground of Building A through Courtyard. There is 1 girl patrolling corridor. I doused few gas torches and sneaked to Grotto. There I performed ritual. Time to escape.
Every door is closed. I went to Auditorium and through it to stairs. Here is haunt patrolling, so I doused 5 torches and mossed floor under stairs. I sneaked to left side of stairs, mantled on stone railing and fell under stairs. I went behind haunt to Reception. Then went right to starting point. Quietly descend via loud stairs, because spider and thief near starting point can hear you. Open door with Master key and go to car.
You could also go to Attic for alternate ending. It's mot hard, but explosion 2nd alert demon in generator room and I wanted to avoid that.
STATS:
Time: 0:58:28; Loot: 6731/6731
Pockets Picked: 0/2; Locks Picked: 6
Back Stabs: 0; Knock Outs: 0
Damage Dealt: 0; Damage Taken: 0; Healing Taken: 0
Innocents killed: 0; Others killed: 0
Iron Beasts Destroyed: 0; Disabled: 0
Secrets: 6/6 + bonus loot objective (5000 loot)
GHOST: SUCCESS
PERFECT GHOST: SUCCESS