Wesker made his first appearance as a non-playable character in the original "Resident Evil" game. In that game, he is the commanding officer of Alpha team of the Special Tactics And Rescue Service (STARS), where he initially helps the player by leaving supplies and useful information. Wesker is eventually revealed to be a double agent working for the Umbrella Corporation; ordered by his superiors to lure the STARS into the Spencer mansion to be used as test subjects against the mutated creatures to gather battle data, although he later implies that this was itself a cover for his own agenda regarding stealing Umbrella's research.Wesker: "I think you misunderstand me, Jill. To me, the monsters you mention mean nothing. I'm going to burn all of them together, with this entire laboratory. I must complete my mission, as ordered by Umbrella. // Jill: So you're planning something else? // Wesker: If you succeeded in developing the world's most powerful biological weapon, what would you do? What if you were in charge?</ref>Wesker: Smart girl... but I think you misunderstand me. The things you mention are nothing. I'll burn all of them along with this entire laboratory. That’ll be the end of my connection with Umbrella. // Jill: What? What are you planning? // Wesker: I'm going to show you something.</ref>Wesker: Umbrella... well, I used some carrots and sticks to cow him, but it had nothing to do with Umbrella. I just used Barry for my personal interests. Though both you and Barry seemed to think I was following Umbrella’s orders. // Jill: What? What are you planning?! // Wesker: I guess it’s time for show-and-tell.</ref> Chris Redfield, Jill Valentine and the others come to learn of Wesker's true motive, but after releasing the Tyrant monster, Wesker is seemingly killed. The Sega Saturn port of "Resident Evil" features a Battle Mode minigame where the player can fight a zombified version of Wesker.