Storyline

The  is the underlying sequence of main mission tasks and events in the standalone mod S.T.A.L.K.E.R.: Lost Alpha and is the central thread that guides the game.

"...came to in the den of some dude, can't remember anything. Just have a PDA on me with a picture of some other dude. There's just one message in the PDA - kill Strelok"

- Detailed task information

Overview

 * The game has an underlying plot consisting of individual tasks that broadly acts as a loose anchor to guide the player towards some form of conclusion to the game.
 * Released versions of S.T.A.L.K.E.R. also had plots for guidance. In the case of S.T.A.L.K.E.R.: Shadow of Chernobyl this worked quite well within a 'sandbox' environment but for S.T.A.L.K.E.R.: Clear Sky this often seemed contrived outside of large set-piece offensive manoeuvers and designed to keep the player "running around".
 * Very few S.T.A.L.K.E.R. Builds had plotlines at all since they were largely used to demonstrate the playing environment, weapon capabilities or aLife behaviour.
 * In the Lost Alpha, there is a very competent (although still faulted) plotline that exploits many facets of play from all released games, incorporates whole reworked scenes from earlier builds (such as Contact appearing in Military Warehouses from Build 1844) and pretty much all of the Levels from the whole of Build 1935 being given a plotline where none existed of note.
 * The completion of the various storyline missions have a variety of effects upon the player's status in the game. Most will improve Rank or Reputation, but some will affect (usually positively) the player's Relationship with the various Factions.
 * The individual sub-pages listed here attempt to document these changes.

Cordon

 * Kill Strelok
 * Find out information about yourself
 * Find the artifact (Cordon)
 * Rescue novice and retrieve the flash drive
 * Cleaning out the place (previously "Cleaning")
 * Find the second contact
 * Save Fox
 * Find the missing wagon key
 * Find the three numbers to the safe code (Freeplay)
 * Find the safe (Freeplay)

Garbage

 * Respond to the call for help
 * Kill the sniper
 * Get control of the hangar
 * Meet with Seriy
 * Help the Duty checkpoint (on first approach to CP)
 * Meet with Negotiator (only if joined Duty)
 * Find the artefact (Garbage) (for Sin)
 * Talk with blockpost group (only if joined Duty)

Agroprom

 * Help the stalkers
 * Save Mole
 * Get information about Strelok from Mole
 * Find Strelok's flash
 * Help Ratcatcher
 * Find the militaries' documents

Great Metal Factory

 * Help the group of stalkers (optional)
 * Meet Petrenko
 * Meet Petrenko's contact
 * Offer assistance to Duty at the bar.
 * Destroy the heli's

Dark Valley

 * Find and wear a bandit suit
 * Get the bandit's password
 * Meet Monolith informer
 * Retrieve information about X18
 * Reach Darkscape
 * Find the bandits' documents (if communicative with Sin) (not if joined Duty)
 * Free the Dutyer from prison (on return from Darkscape)

Darkscape

 * Reach the rail tunnel
 * Find the entrance to the mines
 * Go deeper into the mines
 * Leave the mines
 * Clear Sins base with the Duty group. (only if joined Duty)
 * Find the disc with intelligence information (only if joined Duty)
 * Return to Voronin (only if joined Duty)

X18 (Darklab)

 * Find X18 secret documents
 * Get file about experiments

Rostok Factory

 * Meet the duty leader.
 * Help duty reclaim their HQ.

X14 (Secret Lab)

 * Access the lab and kill the bloodsuckers
 * Find the documents for Sin (if communicative with Sin) (not if joined Duty)
 * Find the code to the door (usually auto-completes)

Yantar

 * Talk with the scientist
 * Get wire for the scientist
 * Meet with Kruglov
 * Get the psy helmet
 * Find yantar recon team (only if joined Duty)
 * Eliminate bandits camps (only if joined Duty)
 * Find Greben's stolen stuff (only if joined Duty)
 * Retrieve the lost rifle. (optional)

Dead City

 * Get the scientists package
 * Meet the Guard
 * Meet the Informer

Swamps

 * Meet Doc

Military Warehouses

 * Meet Ghost
 * Explore nearest village
 * Meet Contact
 * Attack the base and get the artifact
 * Return the artefact to Sakharov
 * Missing weapon (optional)
 * Meet with fang
 * Meet with Ghost in Pripyat

Radar

 * Find Nomad on Radar
 * Nomad's belongings (quest)
 * Meet the Patriarch
 * Destroy the helicopter.
 * Kill the mutants.
 * Get x10 passcode
 * Reach the bunker

Outskirts

 * Go meet Barkeep in Outskirts
 * Meet Ivancov
 * Infiltrate freedom bar (only if joined Duty)
 * Meet with Voronin
 * Reach outskirts facility
 * Meet Guide

Construction Site

 * Help the forgotten stalker trader (optional)
 * Find the Duty group deep in the zone (only if joined Duty)
 * Help the rest of the Duty group (only if joined Duty)

Forest

 * Find something of the dead composer. (optional for Kruglov)

Countryside

 * Find the underground tunnels at the waterdam.
 * Find another way into the underground.
 * Find the scientist.

Lost Factory

 * Meet the scientist
 * Find the exit to the tunnels.

X16 (Brainlab)

 * Find the emitters.
 * You're dreaming, follow your dream
 * Turn on brain power-station
 * Disable psy-brain power supply
 * Find secret exit from lab

X10 (Bunker)

 * Disable security system
 * Disable psy-emitters

X7

 * Disable Earthquake Doomsday Device

Pripyat Underground (Damned)

 * Find the way to Pripyat
 * Find the code to the door (Damned)

Pripyat

 * Assist the military
 * Meet Lieutenant Vasilev
 * Meet Ecologist contact
 * Help the Ecologists take measurements
 * Meet Ghost in the hotel

Chernobyl NPP

 * Help the military (military thread)
 * Help the military advance (military thread)
 * Fortify the gate (military thread)
 * Destroy the BTR (military thread)
 * Help fight off the ambush. (military thread)
 * Help eliminate the heli hunters (military thread)
 * Help eliminate the mutants (military thread)
 * Meet with the military recon leader (military thread)
 * Help the recon unit (military thread)
 * Help Duty (only if joined Duty)
 * Help duty (only if joined Duty)
 * Find the Duty recon unit (only if joined Duty)
 * Find the way into Sarcofagus (their spelling)

Sarcophagus

 * Get generators code from primary terminal in control room
 * Restore power in control room
 * Follow monolith call ('bad' ending)
 * Get generators lab passcode
 * Reach the generators

Generators

 * Follow Ghost to X-2 Lab
 * Distraction tactics
 * Set TNT near the Duty camp Freedom quest (not implemented v1.3003)
 * Send poisoned beer to Duty Duty quest (not implemented v1.3003) (obvious typo)

X2 (Warlab)

 * Find main power generator switch
 * Restore power
 * Find door switch
 * Find a way to disable the lock down
 * Get access to main control room
 * Get to main control room
 * Deactivate generators

Generators 2 (Unknown Area)

 * Talk to ghost at the cemetery - transition to Freeplay.
 * Follow the signal - transition to Freeplay, eventually.