Albert Wesker is a fictional character in Capcom's Resident Evil series (Biohazard in Japan). He is first introduced in the original Resident Evil game, in which he is the captain of U.S. police team S.T.A.R.S. His character is further explored in subsequent installments, which greatly expand his role in the series' extensive narrative.
Introduced in the first game, Wesker has been one of the main antagonists throughout the series, where he usually manipulates story events behind-the-scenes. Wesker seeks to replace humanity through mass extinction and forced evolution, believing it to be an evolutionary dead end. To this end, he is affiliated with the Umbrella Corporation as one of its most promising researchers, and at the same time participates in illicit activities by going undercover as a S.T.A.R.S captain in Raccoon City. Through the course of much betrayal of his allies to further his own plans, Wesker fakes his death, gains superhuman abilities from an experimental variant of the Progenitor virus, and works with both Umbrella's mysterious rival company and their successors in the field of biological weapons development, TRICELL, until his ultimate defeat by Chris Redfield in Resident Evil 5.