See the Clear Sky
Finish S.T.A.L.K.E.R.a Clear Sky on any difficulty level.




Mom, I'm going to the Zone
Finish the game on Novice difficulty.




Lucky son of a gun
Finish the game on Stalker difficulty.




Stalker with a scar
Finish the game on Veteran or Master difficulty.
Play the game on easy until just before the last shot to be taken to end the bad guy at the plant. Save game on easy, change the option to veteran, finish the game and get all stackable difficulty achivements in one go.

The true Stalker
Visit all in-game locations.




Pub crawl
Meet all barmen in the Zone.
You would think this achievement would be self explanatory and simple, but, looking at the stats, it is easily missed. Don't confuse a Trader for the Barman. If they sell weapons and armor, it's a Trader.
There are only 4 Barmen:
Cold - located in Swamp at Clear Skies Base. Story related, cannot be missed.
Ganja - located in Dark Valley at Uncle Yars Hangar or Freedom Base
Borov - located in Garbage at the Bandits Train Station. This is the one easily missed because if you kill a bunch of Bandits, you will no longer be allowed to enter the hangout. And, the Barman is not easily seen. Upon entering the rear of facility, the Technician & Trader are located inside the train building. The Barman is located to the right outside behind a large barrier wall.
Kolobok - located in Ahroprom at the Duty Base inside the 1st Hangar

The Savior
Help Vasyan to repel the attack of dogs and climb down the stone.




Boss Helicopter
Kill Boss Helicopter at Limansk hospital.




To those who hear us
Climb high and listen to the full version of radio message.




Genesis flood
Let water run to the undergrounds, kill mutants and return alive.




New old friend
Go through the military Cordon and speak to Sidorovich for the first time.



Junior forester
Meet Forester and return him what is lost.




The lost city
Enter the secret city, Limansk.




Who are you without a duct tape?
Use the service of all Zone technicians.
There are 6 of them:
Novikov (Swamps, Clear sky base)
Limpid (Garbage, Bandit main base in the depot)
Garin (A sleeping a**hole, Garbage, Flea Market)
Uncle Yar (Dark Valle, Freedom base)
Thunderov (Agroprom, Duty Base, Agroprom Research Institute)
Aydar (Agroprom, Factory)
But Garin is a D*ck, almost whole time he is sleeping on the top of the flea market (unavailable - don't try to wake him up) and he will awake almost before night (about at 21:00/9pm and he is available almost to morning) but I had no luck for him.

Know thyself
Assist Hermit and finish his quest in Undergrounds.
This is unlocked once you reach Agroprom. There are two bases here. Both should be friendly, unless you've done something very bad. The northern one is a Loner base, the southern is a Duty base.
In the northwest corner of the Loner base, there are four short silos. Right in the middle of them is an open hatch, with a ladder. Down there is an NPC, the Hermit. Simply accept his quest of retrieving a PDA from another dead Stalker.
The location will be marked on your map once you accept, it's west of the Hermit's location, in a hut in the bog. The hut is full of a chemical cloud, which shouldn't be an issue, as it doesn't damage you quickly enough to prevent you from simply getting in, searching the single corpse in there, finding the PDA and returning to the Hermit.
The achievement unlocks once you hand the PDA in. You'll receive a GP-25 "Koster" under-barrel grenade launcher for the AK rifles.

Decent start
Find the stash with valuable habar at swamps.



AWOL
Help Semyon Lambee.
You can find Semyon in a small tunnel close to Rookies Village (next to where Tolik is in SoC). Ignore the dialogue option to help him free his CO and instead take the quest to bring him his friend's PDA.
In order to get to the PDA, go to the rail bridge. On top of it, there is a Bubble anomaly. Jump into it and it'll teleport you straight to the dead soldier. Loot his body and deliver the PDA, at which point the achievement should unlock.

Life of the party
Find the forgotten guitar.
Go to the Aprophram research map. Go to Duty's base. Go to the mutant museum. Its just a small shed on the way out on the left of the base. You should see a bunch of stuffed mutants. There should be an NPC called Inquisitor. The guitar is sitting behind the couch across from him. You do not need a quest active to pick it up.

Relics of the past
Find the time machine in Limansk.
When you find the entrance, the door will be closed, we rest against it and release a burst (since there are boxes behind it that block the way) and the same with the second door.



Trophy Hunter
Find the trophy AKM-47/2.
The quest for this weapon is given randomly by any group of stalkers in Cordon. I was lucky enough to immediately have it, but you may have to do other fetch quests first. You have to reach the attic of a building where you fight the military for the main story quest (you will have a marker telling you where it is). to retrieve the weapon. It's in a fridge, I approached it from the back on the left and it allowed me to open the stash and pick it up.
This quest is required, as without it this fridge will be empty.
Turning this quest over is not required, as you unlock the achievement upon picking up this weapon.

Swamp Lord
Join "Clear Sky" faction and defeat Renegades.




Garbage Hegemon
Help Free stalkers or Bandits to be victorious in their conflict.
You can join the STALKER faction in Cordon inside the Neutral base. Afterward you can follow the faction war which takes you to Garbage to finish capturing the Bandit base to earn the achievement. I did not join the bandits and shot them after they asked me for money so I'm not sure how this goes on the Bandit side.

Forever aloner
Finish the game without joining any faction after leaving the Swamps.




The question of Ideology
Make the choice between Freedom and Duty and help your faction to defeat their rivals.




One of us
Join any faction after leaving the Swamps.




Avenger
Liquidate machine gunner at military block post.
This can prove to be a bit of a beginner's trap, it was for me when I first played on PC anyways. You can unlock this achievement by killing the machine gunner at the military base when you first enter Cordon. The problem is that you will most likely be turned to bits by the machine gunner's fire as he almost never stops firing. The machine gunner can be skipped by returning to the Swamp and leaving through the northern exit, but then you won't get the achievement. Using beforehand knowledge, I saved up ammo for my AKM and upgraded its accuracy and equipped it with a scope that I bought from the Clear Sky trader (the AKM needs an upgrade to equip the scope as well). You can earn some money by doing quests for Clear Sky members around the Swamp and returning to the trader to collect the money. Once you're prepared, you will want to run down the hill at the Cordon entrance and hide behind a rock at the bottom of the hill to give you cover before the machine gunner starts firing at you. Then peek around the corner and try to land some hits on the machine gunner and kill him, you will still likely take hits but it is lessened by your cover. All you can really do for this achievement is be prepared for him.

In socks alone
When dived into that very basement with empty pockets.
The ruined building next to the basement entrance has a chest you can use to store all your items before going in to the basement. After you've recovered from the effects on the flashbang and collected the PDA you can retrieve your equipment.
You'll also still need to complete the quest to retrieve your items from the flea market despite having stored everything safely in the chest. However, you now have the advantage that you've got whatever equipment you brought with you available, not just the few items you can collect next to the PDA, making the quest considerably easier.

Gun Baron
Find all unique weapons.
The only thing you have to do is go to every single squad commander you encounter and ask them if they need help. You complete every single weapon fetch quest there is and boom achievement completed. Other users have already posted the list of weapons and zones where you can get them. There is only one that is completely bugged: Upgraded PMm
That pistol fetch quest is done in the very first area, the swamps, but more often than not you will encounter a plain pistol without upgrades. You will have to manually upgrade it at the Clear Sky base. Make sure you pick the very first upgrade (which greys out the second) and then every other one that allows you to upgrade in the next tile through their dependencies.

Artifact sommelier
Find each artifact in the Zone.
Gravity artifacts
Jellyfish, Stone Flower, Night Star, Twist, Gravi, Goldfish.
Thermal artifacts
Crystal, Fireball, Mom's Beads, Eye, Flame.
Electric artifacts
Sparkler, Flash, Moonlight, Battery, Dummy, Snowflake.
Chemical artifacts
Stone Blood, Hunk of Meat, Soul, Gingerbread Man, Bubble, Firefly.
Unknown origin
Compass, Scarlet Flower.
Please note that the rarity of artifacts does not depend on the difficulty level. Rare artifacts can only be found using the Veles detector. Which is located at the very beginning of the game in the Swamps.
Also, no matter how much you run through the anomalies after the emission with a location reboot, you will not find a goldfish or a bubble in the swamps. There will be niche artifacts there.

Stashfinder
Find and steal items from back of the Suslov shop in marshes.
At the back of Suslov's store building (outside), on the left side, as you face the wall, there should be a ladder. Climb it and turn left to see a small room with a ladder inside. Drop down to that room and look to the left facing the ladder. You should find some vodka, bandages and a first aid kit on the shelves. Pick it all up and you will unlock the achievement.

I am machine
Enhance your maximum weight capacity by 60 kilograms.
First, I got my hands on the sunrise suit, which may be sold by Sidorovich (Neutral - Cordon), Shilov (Stalkers - Cordon), Ashot (Freedom - Dark Valley) and Thrush (Stalkers - Ahroprom). You can also obtain it by leading the stalker squad through the nothern swamps in Ahroprom. This suit has 2 artifact slots and can be upgraded to have 5 slots total. In addition, you can add 15 kg to the base weight through upgrades.
After purchasing the suit (6250 SR), I upgraded for three additional artifact slots (7500 SR) and purchased the upgrades relief vest, polymer bodysuit, and relief backpack (8750 SR).
Finally you'll have to hunt for night star, gravi, and goldfish artifacts to fill up the remaining 45 kg. Don't equip these artifacts until you have enough to add 45 kg capacity, or you will get irradiated. Once you tick over a weight cap of 110 kg, you'll unlock this achievement!
Where to find weight cap artifacts:
All of these artifacts have a random chance to spawn from certain gravitational anomalies (whirligig, vortex, springboard).
One night star artifact is located in the Depot basement in Garbage, behind a closed and locked door. The door will unlock when you reach good reputation with the Bandits faction, or when you complete factions war while fighting for the Stalker faction.
One gravi artifact is guaranteed to spawn in the northwest corner of the Great Swamp. Next to one of the derailed train carts is a bunker. Against the back wall from where you enter the bunker, behind the mattress, is an anomaly detector (it's very difficult to see or pick up). Pick it up and equip it, and the artifact should spawn next to the campfire. This will also unlock the Decent start achievement.
One gravi artifact is rewarded for escorting the Stalkers from the camp in the east of the Red Forest. You'll encounter them naturally through main story progression. This is very difficult and not worth the effort.

Meat constructor
You found all "meat" artifacts. Abomination, but useful to survive in the Zone!
Required Artifacts:
Stone Blood
Meat Chunk
Soul
Eye
All four artifacts must be currently in your inventory in order for the achievement to unlock. Unlike the Artifact Sommelier achievement, it must be done in a single playthrough.
Step 1: Stone Blood
Start a new game on Novice difficulty and run through the tutorial. Once you have free roam, travel Northwest of the Fishing Hamlet until you come across the gas swamps. If the artifact you find here is not the Stone Blood, you must start a new game. This artifact doesn't seem to spawn anywhere else and may instead be replaced with some other one. Once you've managed to acquire the Stone Blood, head North to grab the hidden Veles Detector, which is necessary for the other three artifacts. If you don't already have know where this is, check this page:
Step 2: Meat Chunk and Soul
Continue the main story until you gain access to Garbage, which may require at least helping Sidorovich and the Stalkers. Make sure to not actually join the Stalker faction and maintain neutrality so Bandits aren't immediately hostile, and consider stocking up on medkits and energy drinks if you haven't already. Create a savegame just before the level transition to Garbage, as artifacts will be set once an area is loaded for the first time. Once you enter Garbage, sprint through the bandits who attempt to shake you down, and make your way to the gas swamps just North of the entrance. There should be two artifacts available here. If there is only one, reset your save (the manual one, not the autosave/last save.) After a few attempts, you should eventually get both a Meat Chunk and Soul.
Step 3: Eye
Head to the West exit of Garbage and enter the Ahropom Research Institute area. From there, head to the Westernmost entrance to Yantar. Make a manual save just before the level transition like before. Once you enter Yantar you will head Northwest and then North along the outskirts of the region, following the power lines, until you find a large claw-shaped formation covered in Whirligig and Burner anomalies. This may take a few tries due to the awkward geometry of the anomaly, as the artifact may become stuck in the ground or the Burners may outdamage your medkits. Sooner or later you will find an Eye, and with all four artifacts in your possession the achievement should now be yours!

Modifier
You found 18 flash drives. Use them wisely.
Novikov: (Swamps)
1.Flash drive with data on muzzle brakes for submachine guns:
Lies in the stash "Backpack on the corpse". Coordinates sold by Shustry at the Clear Sky base for 800 rubles.
2.Flash drive with data on ultra-light Kevlar body armor:
Given by Suslov for helping the outpost in the Swamps.
3.Flash drive with data on barrel modification for submachine guns:
Given by Suslov; you need to strengthen Clear Sky’s presence in the Swamps.
Van: (Cordon)
4. Flash drive with data on pump mechanisms for shotguns:
Lies in the stash "Road to the Swamps". Coordinates sold by Shilov for 1000 rubles.
5. Flash drive with data on electronic stabilization systems for shotguns:
Lies in the stash "Case behind the dump". Coordinates sold by Brodyaga for 800 rubles, after completing the quest "Help the stalker".
6. Flash drive with data on automatic weapon balancing:
Take from the corpse of the General, located at the ATP. You can find him while doing Sidorovich’s storyline quest.
Transparent: (Dump)
7. Flash drive with data on a closed breathing system:
Lies in the stash "Dead man’s backpack". Coordinates sold by Zub, Borov, Garin, and Vasyan for 1500 rubles.
8. Flash drive with data on psi-radiation protection system:
Lies in the stash "Corpse at the Dump". Coordinates sold by Zub, Borov, Garin, and Vasyan for 1500 rubles.
9. Flash drive with data on reinforced army body armor:
Lies in the basement of the Market. Can be taken in a storyline quest after activating a tripwire.
Uncle Yar: (Dark Valley)
10. Flash drive with data on sniper rifle barrels:
Lies in the stash "Military corpse". Coordinates sold by Ganja and Ashot for 2000 rubles.
11. Flash drive with data on muzzle brakes for sniper rifles:
Lies in the stash "Loot in the bushes". Coordinates sold by Ganja and Ashot for 2000 rubles.
12. Flash drive with data on electronic stabilizer for sniper rifles:
Given by Chekhov as a reward for helping fight the Mercenaries in Dark Valley.
Gromov: (NII AgroProm)
13. Flash drive with data on muzzle brakes for machine guns:
Lies in the stash "Cylinders at the grave". Coordinates sold by Major Zvyagintsev for 4000 rubles.
14. Flash drive with data on machine gun automatic balancing:
Lies in the stash "Corpse in radiation hotspot". Coordinates sold by Mityay for 5000 rubles.
15. Flash drive with data on gas vent modification for machine guns:
Given by Hermit as a reward for the quest "Find the PDA". He can be found in the buried underground near the back exit.
Aidar: (NII AgroProm)
16. Flash drive with data on pump mechanisms for combat shotguns:
Lies in the stash "Deck near the tree". Coordinates sold by General Krylov for 900 rubles.
17. Flash drive with data on muzzle brakes for pistols:
Lies in the stash "Pipe fragment". Coordinates sold by Zub, Borov, Garin, and Vasyan for 500 rubles.
18. Flash drive with data on barrel modifications for pistols:
Lies in the stash "Black backpack in the debris". Coordinates sold by Zub, Borov, Garin, and Vasyan for 500 rubles.

Stalkerstrike
Kill 50 enemies with headshot.




Explosions magnet
Be killed by grenades 20 times.
This is easier than you think. You need to die by grenade, nobody told it has to be an enemy to throw them. Just kill yourself with a few of them and you are done.
Oh, and getting damaged by a grenade appears to at least sometime count as a kill. I discovered it by getting shot in the face and then subsequently damaged by two grenades and my counter ticked up twice.

Mock of a stalker
Die from 5 different anomalies.
In this stalker there are a lot of anomalies (15+). Probably you will earn this achievement during the game even if you don't want, but if you want to earn it asap just do a manual save, die and reload, it will count.

Drag and sell
Sell goods for more than 100 000.
If you want to make this easy on yourself forget about it until you hit the red forest area then before talking to a stalker make a save and then ask them for jobs until you get retrieve tank machine gun. Make sure you have plenty of weight capacity but there's a box near the anomaly thing on the way of you need to dump some stuff. Head off to the right and look for a passage (full of snorks) to get though to the tank. Lift the machine gun and as many rounds (there's 2000 there) as you can then head to your nearest trader, make another save and then sell that bad boy for 70 grand alone plus whatever else you have then load the save and sell it all again as many times as you need but it shouldn't be more than 3. After that go back and give the gun back or keep it sold or do whatever with it.

All the money in the Zone
Sell goods for more than 250 000.

Gunsmith
Upgrade 5 different weapons to maximum
Go to the gunsmith with a double barrel shotgun, and save the game.
With 300 rubles, fully upgrade the shotgun, then reload your save.
Do this five times total, and you have the achievement.

Overloaded but not overcame
Walk 10 kilometers with overload
While the other solution does work, there is an easier way to earn it without slowing yourself down just for the achievement.
When you pick up an artifact that increases your carry weight (Night Star, Gravi or Goldfish) and equip it, you can carry over 50kg and not incur a stamina penalty. The achievement progress will increase so long as you are over 50kg regardless of whether you are actually overloaded or not. I used these artifacts when I got them as I like to horde my spoils of war and noticed the achievement progress increasing when I was simply over 50kg and not overloaded. This should also work if your armor has a weight limit upgrade as well and use that. This can be earned even faster if you can equip an endurance artifact (Battery, Shell or Snowflake) as those let you run for a longer time.

Taxi!
Use guide service 10 times




PseudoFlash
Drink 100 energy drinks
This can be easily achieved by reloading saves
Once you have a decent number of energy drinks, save then drink them all, you'll see the progress increase then reload the save and drink them again, they'll count again. Repeat until unlocked.

Friend for an hour
Be supported by and gain maximum reputation with 3 or more factions
Maximum reputation means exact half of bar (to friends arrow), so you don't need to do more than just ordinary mission for factions. Ask for mission any Squad leader (dot with circle).