S.T.A.L.K.E.R. Wiki
S.T.A.L.K.E.R. Wiki

Semenov (Russian: Семёнов) is a scientist of Ecologists faction and the replacement for Professor Kruglov (if he dies) during the events of S.T.A.L.K.E.R.: Shadow of Chernobyl.


Semenov is another scientist in the mobile lab and the assistant of Professor Sakharov, although game-wise, he only makes an appearance if Professor Kruglov is killed.

According to professor Sakharov, Semenov used to be his student back in college in his class dealing with genome experiments.


Shadow of Chernobyl[]

Assistant Semenov is the replacement character for Professor Kruglov, in the event that Kruglov is killed in the Wild Territory. Like Kruglov, he will accompany the Marked One in taking measurements around Yantar. However, he is only fitted with a typical SSP-99 Ecologist Suit, affording him with less protection than Kruglov (who wears a combat made SSP-99M).

Background information[]

Shadow of Chernobyl 'bio' file[]

A short bio, that was omitted from final version of S.T.A.L.K.E.R.: Shadow of Chernobyl game describes him as follows: [1]

"Research assistant at the mobile lab. No details available."


  1. S.T.A.L.K.E.R.: Shadow of Chernobyl, stable_bio_name.xml; id=yan_semenov_bio