An old friend (of the Major)

 is a storyline side mission that appears in S.T.A.L.K.E.R.: Lost Alpha from version 1.4000 onwards.

Overview

 * The mission should not be confused with a similarly named mission offered by Seriy (hence the "of the Major" clarification attached to the mission name)

Trivia

 * The objective stalker frequently dies in the underground anyway.