NEST

The Raccoon City Underground Laboratory was a large subterranean laboratory located in the outskirts of Raccoon City that was operated by the Umbrella Corporation and administered by William Birkin.

This sprawling facility, built primarily for the research and development of the G-virus, could be accessed via an underground cable car system that linked the facility to the sewers beneath the Raccoon City Police Department and the Umbrella Research Center, a private train station on the lowest level, as well as a personal elevator that allowed access to the Research Center's train station above that.

History
The Facility was built by Umbrella specifically for Dr. Birkin's G-virus research.

In late September, William was severely wounded by a U.S.S. team. When the t-Virus spread, it reached the city from the sewers, after being consumed by rats, who in turn infected the water supply. However, this time, the facility was safer. During the crisis, the experimental Hunter Rs' were released, killing at least ten scientists. One of the researchers managed to alter the temperature controls, freezing the creatures in their tracks.

Not long later, Monica - a researcher, attempted to steal a G-embryo sample. During the exploration of the facility by an ex-researcher, Yoko Suzuki and three other survivors reverted the temperature controls to normal in an attempt to use the turntable. Luckily, they managed to kill the Hunters before escaping.

They then activated the turntable and rode it to the outside world. At the same time, Monica rejected the G-embryo, which she had somehow become host to. The creature followed the survivors up the shaft and attacked them. However, it was defeated and the survivors escaped.

On the early hours of September 30, five survivors arrived at the facility in hopes of escaping via the underground train: Claire Redfield, Leon S. Kennedy, Sherry Birkin, Annette Birkin and Ada Wong.

However, the t-Virus had, since the visit by Yoko, spread throughout the facility further. Claire and Annette worked together to produce "DEVIL," a cure for Annette's daughter Sherry, who had also been impregnated by her father, William. At the same time, Leon and Ada tried activating the train. Ada was injured saving Leon from a T-103 which had been stalking them since the Sewers. Her severe injuries led Leon to think she was dead.

Prior to shooting Claire for supposedly killing her husband, Annette was attacked by a mutated William, who slashed through her body with his talons before escaping. On her way to the train, Claire was attacked by William. She eventually managed to defeat him, seemingly for good, before escaping.

On the escape train, Claire gave the cure to Sherry moments before she succumbed to G, curing her almost instantly. The trio then left Raccoon City as the facility self-destructed as a safety-precaution. However, a second self-destruct sequence was activated on the train after biohazardous tissue was detected - William, having mutated into a enormous blob of organs and teeth. After destroying the once brilliant scientist-turned organic blob, the three escaped the train to the outside world, with William killed in the blast.

1F
The "dummy" building from which the cable car system connects to the factory, and which allows access to the turntable elevator. It is disguised as an abandoned factory, warehouse and train marshaling yard. A room in this level monitors power to the main elevator. This floor has two levels, an upper and a lower - the lower is located underground.

B1F
This level as well the next three beneath, contain the main power room and self-destruct mechanisms for the laboratory. Access is via elevator to B4.

B2F
This level is accessible via a small service lift from B1. It consists of a steam-filled room filled with machinery. A second service lift on this level accesses B3.

B3F
This level consists solely of a smelting room containing an observation platform above a large, open vat of molten metal. Its role within the laboratory is unknown. This level is accessible via a small service lift from B2.

B4F
The first of the main laboratory levels, this is where the turntable usually stops. Located here are the central core power transformer, several dormitories for the researchers, assorted laboratories including a B.O.W. culturing room, low temperature experiment room, and operating room. Access to the lower levels (B5, B6 and B7) is expedited through a large air duct.

B5F
The second of the main laboratory levels, this is where Birkin's main laboratory is located, as well as various computer and security monitoring rooms. Also located here is a large service elevator to the B8 train platform.

B6F
Located here is a break room for the researchers as well as further monitoring facilities. At the time of Outbreak, areas of this level are inaccessible, suggesting the facility has yet more areas that remain unexplored.

B7F
Located here are various chemical storage rooms and a laboratory containing incubation tanks. This is the lowest level that can be conventionally accessed.

B8F
This being the very bottom level of the facility, the underground train platform is located here. The tunnels leading from the platform eventually lead into city limits.

Further notes

 * This may be one of the most visited locations throughout the Resident Evil series. It appears in Resident Evil 2, Resident Evil Outbreak ''Resident Evil: The Darkside Chronicles and "Resident Evil: Zero".