Professor Kruglov

 is a supporting character appearing in both S.T.A.L.K.E.R.: Shadow of Chernobyl and S.T.A.L.K.E.R.: Lost Alpha.

"He has a Ph.D in Biology. Studied pathogenic mutations in animals outside the Zone. Came to the Zone to study blind dog mutations."

- PDA contact biography

Overview

 * Leader of the Ecologists in the Yantar map.
 * Still uses the very cool "pistol spin" animation.

S.T.A.L.K.E.R.: Lost Alpha

 * He is the leader of the Ecologists at Yantar.
 * Stationed in the workshop close to Sakharov's Bunker, he never leaves the building, which also serves as a blowout shelter (v1.3003)
 * Performs additional duties as a Technician from v1.4000 onwards.

Missions Given in the Lost Alpha

 * Find something of the dead composer.

S.T.A.L.K.E.R.: Shadow of Chernobyl

 * Plays relatively the same role but gives different missions and is located in the retail Yantar map (now Lost Factory in Lost Alpha)

Trivia

 * Although firmly rooted to the Yantar workshop, one of his ecologist colleagues in Pripyat uses many of the sound files that are associated with Professor Kruglov during the Help the Ecologists take measurements mission to the Bus Station.