Tinker Tailor Stalker Spy:

I'm not a Loner. My name is not Kruglov. My task is to infiltrate any Factions that I choose, in order to investigate and seize any of the new prototype weapons and ammunition, that have illegally entered the Zone. I have left the Mercenary Faction to join the Loner Faction. I am the Stalker.
Encrypted Diary: There are many stories, many places and many people who come to the Red Forest and are never heard from again.
* Game Note: