Albert Wesker/development

Appearances
First seen as a supporting character in the first Resident Evil, Wesker appears in the game as the captain of the S.T.A.R.S. unit and leader of its Alpha team division. Wesker disappears early in the game and only makes one sporadic appearance through the course of the story. Near the end of the game, the player (as either Chris or Jill) discovers that Wesker is a double agent working for Umbrella and either witnesses the death of Wesker at the hands of the Tyrant (in nearly all the endings) or finds his decapitated body inside the power generator next to the self-destruct module (in Jill's best ending in the original version). It should be noted, however, that in the remake of Resident Evil for the GameCube, Jill's best ending allows Wesker to escape completely, as his body is not found in the Power Room.

Wesker makes a surprise return in Resident Evil Code: Veronica, having been revived with new superpowers and apparently working for one of Umbrella's competitors. He later appears as a supporting character in Resident Evil Zero and an incidental role in Resident Evil 4 (which is explored further in the PlayStation 2 and Wii version, due to the inclusion of the Separate Ways scenario and Ada's Report). He is also the narrator of the fictional documentary, Wesker's Report, a DVD which covers the events of the previous installments and was released as a pre-order bonus with Resident Evil Code: Veronica X (an updated version of the original Code: Veronica). It was followed by an Internet sequel, titled Wesker's Report II.

From both Wesker Reports, it is learned that Wesker is a Machiavellian schemer who had a hand in the events of nearly all the games in the series, except Resident Evil: Survivor and Resident Evil: Dead Aim, where the entire scenarios were created by rogue operatives outside of Wesker's control. Although his physical presence is not constant and indeed quite rare, the effects of his plans can be visibly seen in almost every game of the series.

In Umbrella Chronicles, players further explore how Wesker survives and escapes the mansion incident during the final moments before the explosion. As he narrates a series of events he either witnesses or takes part in, the player learns how he helps Ada escape Raccoon City as well as how he manages to seize control of the Umbrella Corporation.

Albert Wesker is the main antagonist within Resident Evil 5, in which the truth of his upbringing, and the extent of his connection to Oswell E. Spencer, is revealed by Spencer himself. He serves as the final opponent for Chris and Sheva in a three-part boss battle. He also appears in Resident Evil: The Darkside Chronicles in a flashback of Code: Veronica and during the end of Operation Javier, where he is seen peering below at Javier's body through binoculars.

He appears as one of playable characters in Resident Evil: The Mercenaries 3D.