Stalker servers

This is another first-person game that features a silent and mysterious protagonist, much like Half-Life's Gordon Freeman. You play as the Marked One, a heavily armed scavenger suffering from amnesia and stuck inside the exclusion zone surrounding the nuclear power plant at Chernobyl, Ukraine. Yes, the same nuclear plant that exploded in 1986 and, in S.T.A.L.K.E.R.'s fiction, again in 1989, creating a radioactive hotspot brimming with mutants, heavily armed rival factions, and all sorts of weird, paranormal activity. Your task: Figure out who you are and what's going on at the core of the zone.