Strelok (Стрелок), also known as the Marked One (Mеченый), is the protagonist and player character of S.T.A.L.K.E.R.: Shadow of Chernobyl. He also appears as the main antagonist of S.T.A.L.K.E.R.: Clear Sky and a main character in S.T.A.L.K.E.R.: Call of Pripyat. He was intended to be the protagonist of S.T.A.L.K.E.R. 2, but little is known about the cancelled project.