Resident Evil franchise

Resident Evil, known as Biohazard (バイオハザード) in Japan, is a highly successful franchise of survival-horror that started life as video games developed by Capcom and created by Shinji Mikami. The games have sold over 30 million copies as of February 2006. The series is credited with popularizing the survival horror game genre. This franchise has been heavily influenced by George A. Romero's Dead movies, as well as the Alone in the Dark series of PC horror games, early seminal examples of the genre.

The success of this franchise has spawned several video games, a comic book series, novelizations, two (soon to be three) Hollywood action films, and a variety of action figures. While the games mostly adhere to a consistent storyline, there are enough deviations from the game plot within the films and novels to be considered alternate story lines.

Story
The original Resident Evil revolves around a series of cannibalistic homicides that occur in the Arklay Mountains region, situated north of the fictional Raccoon City in 1998. The local police's Special Tactics and Rescue Squad (S.T.A.R.S.) are commissioned to investigate the sources of these murders. When Bravo Team, the initial team deployed to the area, fails to report back, Alpha Team goes on a rescue mission to find them. They are led to a seemingly abandoned mansion, where the team encounters Zombies and other creatures, leading them to discover the remains of most of their comrades in the house. In the end, it is revealed that the house is actually a front for a top-secret laboratory owned by the international Umbrella Corporation, and that the creatures are the result of experiments with a genetically modified virus called the T-Virus. Resident Evil 0 explores the cause of the viral outbreak and Bravo Team's ordeal prior to the events of the Mansion incident.

The following game, Resident Evil 2, takes place two months after the events of the original game in Raccoon City itself. With S.T.A.R.S. unable to convict Umbrella for their wrongdoings, the company continues their experiments within an underground facility. However, a botched attempt to steal a former scientist's (Dr. William Birkin) work results in the new G-Virus being leaked into the city's sewage. This results in most of the city's population being turned into zombies, leaving only a few survivors trying to find a way to escape the city alive. The third game, Resident Evil 3: Nemesis, takes place around this same time period, and features a similar premise. The game concludes its story by depicting the city's ultimate destruction by a nuclear warhead. The Resident Evil: Outbreak series depicts the attempts of normal civilians trying to escape the city.

Resident Evil Code: Veronica depicts the previous games' survivors attempt to expose the Umbrella corporation and sabotage their operations. Code: Veronica reveals the existence of a rival corporation, who employs Albert Wesker, the crooked leader of the Raccoon City S.T.A.R.S. team, also developing their own bio-weapons.

Set six years after the events of the previous games, Resident Evil 4 begins with the dissolving of Umbrella Corporation. The focus is on a religious cult known as the Los Illuminados that uses a breed of ancient parasites known as Las Plagas to turn victims into mind-controlled psychopaths known as "Ganados". The same Organization seen in Code: Veronica also plays a role in Resident Evil 4, by having two of their agents attempt to steal a master sample of the parasite for their disposal.