-Hard: The code is 8352 every time

Use the code 8352 to get past the locked back door and meet Claudia.

Follow the hall and enter the elevator on the left.

Get the RADIO when it falls down and exit the elevator.

Take Heather's right around the corner, take a right at the next fork, and head to the next hall.

Follow the narrower hall to the storage room just before the ladies' room and get the FLASHLIGHT between the boxes.

Get the BLEACH (Normal/Hard Riddle Level only) from the ladies' room.

Enter the women's' clothing store under the next two shutters.

Get the BULLETPROOF VEST on the clothes rack deep in the room.

Get the HANGER on the coat rack by the door.

Return back and enter the westernmost room on the north side in the bigger hallway with Closers (across from where you originally entered that hall).

Use the HANGER to bring down the ladder and climb up to 2F.

Head up the escalators to 3F and grab the COOKED KEY from the dog through the right double doors.

Head back to 2F, take a left, and enter the shop at the end of the hall to get the WALNUT.

Head through the other door and enter the easternmost room in this hall, Café Turn Mill, at the short fork using the COOKED KEY.

Get the STEEL PIPE on the wall behind the counter.

Exit through the other door, run ahead, and enter Helen's Bakery at the southeast.

Get the DETERGENT (Normal/Hard Riddle Level only) on the cart and exit through the other door.

Turn off the fan at the end of the hall (Normal/Hard Riddle Level only) and pass through the door.

Combine and use the BLEACH and DETERGENT on the bucket by the door (Normal/Hard Riddle Level only; skip this and the next step on Easy).

Back by the fan, turn it on and re-enter the corridor.

Follow the hall, take a right at the fork, and go through the first door on your left to the northeast shop.

Enter the next hall, take a left, and cross over to the other (north) side, then enter the shop in the northeast.

Use the vise to break open the WALNUT and get the MOONSTONE.

Take Heather's right (west) and pass through the pale orange door, then pass through the cafe on the opposite side of the balcony.

Take a left and pass back through the walnut shop at the end, then take the escalators up to 3F.

Use the MOONSTONE to pass through the locked door and go down the long ladder.

Use the Handgun to kill the Split Worm, making sure to dodge its attacks. Hold L2 to see which hole it is coming from next and shoot it when it opens its protective head cover (press the cover button to crouch behind walls or objects). Only shoot it two or three times when it emerges so it doesn't retreat, then dodge its attacks and continue firing to minimize your time. It should die after about 15-20 shots on Normal.

Head west under the shutter and through the next set of doors.