Welcome to the post nuclear explosion city of Pripyat, this is the world of S.T.A.L.K.E.R, a hyper intense, slavic survival experience

You can be-

Loner-The scavengers of the Zone

Military-The Ukrainian army deployed to cover up and hide anomalies from the outside world

Bandit-The Eastern-European cowboys

Monolith-Researchers deployed to the zone to find anomalies and Research mutants

All of these are locked, you start in Loner faction, in Cordon, Sidorovich welcomes you