Sidorovich is the first major trader players meet in S.T.A.L.K.E.R. Shadow of Chernobyl, released in 2007 by GSC Game World and set around the Chernobyl Exclusion Zone. Operating from his underground bunker in the Cordon, he gives early missions and buys artifacts, which made his voice lines a shorthand for starting the game. Russian dialogue clips of him spread through gaming forums, YouTube edits and soundboards, especially among fans who replay the opening hours. The exchange with the player remains popular because it sums up the series' bleak humor and mercenary economy in seconds.