Professor Sakharov

An elderly professor from the mobile laboratory on Amber. With the support of the military and "Duty", he is engaged in scientific research of the Zone. The main factor of research progress is cooperation with stalkers.
In 2011, Professor Sakharov makes a deal with the stalker Shooter: The shooter allegedly wants to help in testing a special device — a blocker of psi radiation. Sakharov gives him an experimental sample of the helmet and instructions to test it at the Yantar plant, but the stalker did not return to the scientist. After a while, the mercenary Scar comes to Sakharov, receives information about the Shooter and performs, together with a group of stalkers led by Lefty, a task to stabilize the psi radiation emanating from the underground complex
In 2012, Sakharov is still engaged in research related to the X16 laboratory, as well as the development of perfect protection against psi radiation. The scientist equips an expedition to the laboratory, which included the Ghost and Vasiliev, in order to turn off the source of psi radiation. However, his plans fail, and the entire expedition dies: The ghost is in an underground laboratory, and Vasiliev is on the lake]. Later, Marked helps Sakharov by completing tasks related to the laboratory.
The marked one arrives at Yantar in order to enter the X16 laboratory and meets with Sakharov, who asks to take radiation measurements together with Kruglov or Semenov. After taking measurements, Sakharov directs the Marked Man to search for Vasiliev in order to obtain information about the location of the entrance to the laboratory. When the Marked One penetrates into X16, Sakharov contacts him, warning about the timer of the psi helmet. After GG gets out of the underground utilities back to the surface, Sakharov invites him to enter the bunker and warns about the raid of military helicopters clearing the territory of the plant from zombies