Resident Evil 0

Resident Evil 0 or Resident Evil Zero, known in Japan as Biohazard 0 (バイオハザード０), is a survival horror game that was developed and published by Capcom for the Nintendo GameCube and released in 2002. It is the fifth game in the Resident Evil series by release order and was the last of the core titles to use the original Resident Evil gameplay system prior to the release of Resident Evil 4.

The game's storyline serves as a prequel to the original Resident Evil, covering Rebecca Chambers' ordeal a day prior to the Spencer Mansion incident.

story
(spoliers) On July 23, 1998, S.T.A.R.S. Bravo Team is sent in to investigate a series of grisly murders in the Arklay Mountains region. On the way to the scene, Bravo's helicopter malfunctions and is forced to crash land in the forest. Luckily, there are no fatalities. The team soon discovers an overturned Military Police transport truck, along with the mutilated corpses of the police themselves. The team soon splits up and Bravo team's field medic, rookie member Rebecca Chambers, begins to wonder what she has gotten herself into. She quickly hooks up with the man the Military Police were escorting to his execution; ex-marine Billy Coen, and the two of them face off against a band of Cerberus, swarms of strange leeches, and a mysterious individual with possible links to the disaster.

Other recurring Resident Evil characters present are Alpha Team leader Albert Wesker and Umbrella scientist Dr. William Birkin. The two make appearances in a few cutscenes, but never interact with the main characters. The game also introduces Dr. James Marcus, one of the three founding members of Umbrella and the true creator of the T-Virus.