Artyom can stumble upon two scavengers resembling Strelok and Doctor (Doc) from the S.T.A.L.K.E.R.: Shadow of Chernobyl in the Theater station. They will converse about having wasted all of their money from the last job on drinks and plan their next trip to the surface, hoping to one day be promoted to full-fledged Stalkers. If the player lingers around for a bit, they talk to him directly.
"Ha! A stalker! Man, if you ever need help with , like, carrying something heavy from the surface…We’ll be ready to join you in a couple of days. We won’t charge much!"