Missing sentry

Major, I have a favor to ask. Our sentry isn't responding. You know where the grocery store used to be? That's where the signal is coming from. Investigate it if you can. One other thing: be careful. Over and out.
― Kovalsky

Missing sentry is a main mission in S.T.A.L.K.E.R.: Call of Pripyat.

Description[]

The mission is provided in two different ways:

If the player has already completed Monolith forces, the mission is given once they return to Pripyat after recovering the Documents concerning item 62.
If the player hasn't completed the aforementioned mission, the mission is given once the player completes Missing recon unit.

A sentry has been missing and Kovalsky is worried. He states his last signal comes from the old grocery store. Kovalsky then asks Major Degtyarev to investigate.

The sentry is found in the grocery store, to the west. Once the player approaches, Stetsenko is heard yelling and shooting. However, there is nothing around him, and it turns out he's seemingly crazy. After a while, he shoots himself. Once the player approaches to investigate, a Controller appears in the back room and attacks the player. When the controller is killed, Degtyarev reports to Kovalsky, saying Stetsenko killed himself, and he killed a controller near him. Kovalsky then deduces the Controller most certainly killed Captain Klimenko by manipulating them into shooting each other. The mission ends there.

Reward[]

There is no reward nor consequence for completing the mission. Even though Kovalsky tells the player he can take more ammunition from Kirillov, if the player took two types before the mission, they won't be able to get more until they complete more missions.

Trivia[]

In rare cases Stetsenko might be killed before the player approaches him by wandering mutants, usually Pseudodogs. This does not impact the mission, however, and the Controller will still appear once the player approaches the body.
An unique dialogue is triggered if the player investigates the body but does not kill the controller, and run far away enough. Degtyarev contacts Kovalsky to tell him Stetsenko killed himself, and he found a controller but had to retreat. Kovalsky then says the controller cannot be left alive after what he've done, and instructs the Major to kill him. The dialogue is unique in that there is no cutscene, and the player still has full control of the character during the dialogue - this is the only time in the game where the protagonist is heard speaking out of a cutscene.