B4F east area passage is an area of the underground laboratory that is featured in Resident Evil 2 and Resident Evil Outbreak File 2.
The east passage from the Main Shaft area lead to multiple different rooms; B4F culture room, B4F low temperature laboratory and the B4F experimentation room. There's also a switch which can be used to open or close the shutter.
The player will unable to access the culture room passage and the experimentation room early on in this hallway except the B4F low temperature laboratory which can be located by turning left from the hallway intersection, finding an icy door.
Once the power is restored inside the main shaft, the shutter on the right can be opened to access the culture room passage. To enter the culture room, the player must first gain access to the Umbrella security system inside the B5F computer room, typing the username as "GUEST" and register Leon/Claire fingerprints in the process. Since the player can't access the culture room yet due to the unavailable of secondary fingerprints, they can enter later in Scenario B.
In scenario A, Leon will encountered Annette Birkin after exiting the B4F experimentation lab. Shortly after, the area shaken as a couple of heavy pipes fell on Annette, leaving her unconscious. The player can assume the G-virus from her before exiting the area.
|The shutter||The shutter is sealed firmly in place.|
|Switch for the shutter||It's a shutter switch. Will you push it? Yes/No
(No power) No response... The power is not supplied.
|Switch for the shutter (Once opened)||The shutter is open already.|
|Door to the B4F experimentation room||The door is opened with a card key.|
|Door to the B4F experimentation room (With the card key)||You have used the Lab Card Key.|
|Door to the B4F culture room (Locked)||It's tightly sealed. There is a panel on the left.|
|The door panel to B4F culture room (Scenario A)||"2 or more staff need to be present to enter." "Commencing with fingerprint verification."
(Afterward) "Commencing with secondary fingerprint verification." Will you proceed? Yes/No
(Yes) "Fingerprint verified."
I need someone else to help me open the door.
|The door panel to B4F culture room (Scenario B)||"2 or more staff need to be present to enter." "Commencing with secondary fingerprint verification." Will you proceed? Yes/No
(Yes) "Fingerprint verified. Access granted."
|The door panel to B4F culture room (After the lock is released.)||The lock is already released.|