S.T.A.L.K.E.R.

S.T.A.L.K.E.R. is the ultimate achievement in OP 2.2 that requires completing the vast majority of the content of the game - quests, stashes, secrets, optional and non-obvious stuff such as aiming for the best/hardest outcome in quests. You have only one attempt to get it; the check is performed at the end of the Bloody Endgame storyline, and only succeeds if you have all requirements listed below.

A few quests and optionals are omitted from S.T.A.L.K.E.R.; they are covered by other major achievements: New Game, Card Player, Vivid Nightmare, and No-Cheater.

S.T.A.L.K.E.R. achievement is really hard to get, because forgetting or messing up even a minor thing will block it, and you will only discover that hundreds of hours later, at the end of the game. Most players who target it in their first run fail.

## Requirements

### Medical-related achievements:

* **Guardian Angel**: Save and escort all 5 surviving scientists in the Wild Territory during the Meet Kruglov mission, including Kruglov himself.

* **Rescue Service**:
	+ Save all Duty members held captive by the bandits in the Dark Valley. See Rescue "Duty" member for details; Bullet, Max Lyuber, Demyan Ivanhoe and Sergey the Shaggy must stay alive and make it to the Dump.
	+ Attempting to save the Psycho in the Army Warehouses by wounding him and giving him a medkit. He will still try to kill you, but you at least tried to save him. See Army Warehouses#Crazy stalker.

* **Doctor Dolittle**: Heal 20 wounded stalkers using medkits. It's difficult to do, but the game is huge and provides you with enough runway for this, as long as you are trying to help every wounded stalker you see on every occasion. It can also be cheesed by healing the crazy stalker multiple times or using the OP 2.2 way and injure the neutral stalkers by detonating gas cans nearby.

* **Mother Teresa**: Revive Chemist by giving him a Living Heart artifact in the Forgotten Forest, during the Inferno quest.

* **Pharmacist**: Bribe Garik 30 times using antirads or first aid kits (2 first aid kits, 1 scientific or military first aid).

* **Keeper of Life**: Never let a single "story" NPC die (the ones that give a beeping message if they are killed). You will be blocked from getting this achievement even if you resurrect the dead NPC with a Living Heart, so you need to reload if anyone important dies.
	+ This achievement is rewarded at the end of the Sniper plotline.

### Plotline-related achievements:

* **Task Performer**: Never fail a single mission from the main plot or side quests. Note: this achievement doesn't count cyclic quest failures - you could fail 9 cyclics without blocking S.T.A.L.K.E.R.
	+ This achievement is rewarded after speaking to Natasha after completing the Hearth and home questline.

* **Chef**: Complete the Sniper plotline by cooking Wulf embryo for Fenrir. The recipe is very complex and some parts are gated behind certain side quests unrelated to Sniper:
	+ Assassination of the Shadow of the Monolith and the subsequent Hunter's stash
	+ Diamond skulls
	+ The monsters' parts (Artifact Klondike)
	+ Mole's PDA (either peaceful or aggressive option)
	+ Walking dead
	+ entire Invisible stashes questline

* **Cartographer**: Solve the mystery of the Floating Islands, specifically make it to the final island in the Hospital.

* **Gromov**: Complete the Volazar questline by getting all modules for the Modified Nanosuit, specifically you will get the achievement from Assembling the modules: Part 10.

* **Defender of the Zone**: Complete the Wave of Mutants plotline (you will get the achievement from The Wave: Last Battle)

* **Librarian**: Collect all 416 documents from Voronin's infamous document scavenger hunt. You will get the achievement in  Just Reward, but only if you didn't buy any documents from Informer!

* **Collector**: Find every single Collector's stash. There are 53 stashes total; you will get the achievement when speaking to Sidorovich after finding the final stash at Beauty and the Beast.

* **Sniper God**: Complete four missions related to long range sniping:
	+ Liberation of the Slavik the Bullfinch's squad during the Floating Islands questline
	+ Sharpshooter from Hog (shoot 130 bottles out of 135)
	+ Crumb the deal from Glimmer Man (intercept the military and ecologist trade in Jupiter)
	+ Test of Strength from Captain Ivanstov (Help a Duty recruit named Viking fight against zombies from afar)

* **Sponsor**: Complete all of Sidorovich's contributions for a grand total of 5.5 million RU.

* **Liberator**: Complete the Valley of Whispers questline.

* **Paparazzi**: Complete most missions that involve taking pictures (except for The Mad Doctor which is not counted here)
	+ Photo of an embryo
	+ Wildlife photography
	+ Anomaly photos
	+ Commemorative picture
	+ Low-key hunting
	+ Wolf's lair
	+ Gauss installation
	+ Deja Vu
	+ NS storyline missions which don't use Missing photographer's camera:
		- Picture of the Monolith
		- Picture for Klyonov
		- Panther's murderer
		- Intruder

* **Detective**: Complete the following three major stash-related questlines while picking up all bonus stashes:
	+ Strelok's stashes
	+ Kostya's stashes
	+ Old-timer's stashes

* Finish the **Video archive** by collecting all discs.

* **Chesser**: Complete the Chess Player plotlines. Recluse must be eliminated in Arguments and Facts and Murzo in Bloody endgame.
	+ This achievement is rewarded after speaking to Natasha at the end of the Hearth and home questline, making that a third requirement.

### Item-related achievements

* **Cognizant of the Zone**: Collect all manual teleporters available in the game (i.e., the ones that require the teleport artifact). Refer to Fast travel#Manual teleport for the full list. The teleports are gated behind the following quests and secrets:
	+ Bonus stash: Yantar, accessible at any time
	+ Strelok's PDA, the teleport is on a concrete slab near Wish Granter and can be hard to see
	+ "Gagarin" prototype storyline
	+ Hostel storyline
	+ Interpol in the Zone storyline
	+ Certain NPC chain quests. **Note:** many items in these are gated behind other quests!
	+ Some quests which are directly required for S.T.A.L.K.E.R. anyway:
		- Sniper storyline, first Fenrir's quests
		- Stash at the Military Laboratory (first quest in the Volazar's stash series)
		- Strelok's stashes
		- Mystery of the Islands storyline, in the bonus stashes for most islands

* **Gun Baron**: Collect all unique guns available in the game. It's enough to "touch" them (i.e. have them in your inventory at least once, independently of each other). There's a specific list of guns you need to get for that achievement. Most of them are gated behind certain quests, and some guns are easily missable in particular:
	+ MP-133 from Missing sergeant - can be missed if Zvyagintsev is killed or not convinced to come back, but can also be obtained in Gladiator
	+ 6G30 "Zeus" from Insurance - can be missed if not grabbed in time
	+ McMillan CS5 "7.92x57" - only available in the stash in Chernobyl-1 or in Sidorovich's Contributions
	+ SVDS - only available in another stash in Chernobyl-1 or in Chemist's chain
	+ Strikeback from Wildlife photography or Fiend's chain
	+ 9A-91 from Wildlife photography
	+ Honorary Vintorez from Special magazine
	+ Hostel from Hostel storyline
	+ VSSK "Backwoods" from either Sniper hunting (broken) or Hard target (new)
	+ KORD "Tank" Machine Gun from either Sidorovich's Contributions or Lootoholic's chain
	+ HK 417 "7.92" from either Disguise or The mercenary bar's safe in Chernobyl-1
	+ FN F2000 "Paratrooper" from Kuznetsov's deck (blueprints)
	+ FN F2000 "Executioner" from either paying 250000 RU from Akim or Lukash's chain
	+ KS-23 from Alexandrych's Jupiter stash
	+ Needlegun from Sidorovich's Contributions, Petrenko's chain, Zakhar's chain, Graybeard's chain, Grey's chain, the sack in Labyrinth,
	+ Ghost's Gauss from Trap for Beast
	+ ... (the full list is about 5x larger and needs its own page)

### Miscellaneous achievements

* **Hero of the Zone**: Achieve 30,000 points on the leaderboard.