Artifacts :
1- Medusa
2- Gravi (And also a Veles detector)
3- Flash
4- Crystal
5- Fireball
6- Flash
7- Stone Flower
8- Meat chunk

Extra stuff :
1 - Guard tower (1st mission)
2 - Starting place after the second blowout
3 - Pump station
4 - Fishing Hamlet
5 - Guard Tower (PSO-1 scope at the top lvl)
6 - Old chruch
7 - Burnt farmstead
8 - Machine Yard
9 - Train thingy (and a half broken Vintorez sniper rifle)
A - Cut fence, and the entry to to Veles detector and the artifact
S - Start, the Clear Sky base
F - Finish,last mission in swamps, Southern farmstead
F3 - Third flashdrive (It's a stash, can get it either from Cold at the bar or Nimble)

Artifacts :
1- Night Star
2- Medusa
3- Medusa

Extra stuff :
1- Route from Swamps
2- Rookie village
3- Old Mill, and a bit before the Bus Stop
4- Broken train bridge, and space anomaly on top
5- Neutral Base
6- Car Park
7- Ruins of a building
8- 'Secret' Camp
9- Army base
10- Entrance to Dark Valley
11- Train ruin thingy (and also a Chaser 13 shotgun around it)
12- Tunnel under the train route
13- Entrance to Swamps' North-East side
14- Entrance to Garbage
15- Entrance to Garbage (Far outpost)

Flashdrives :
F1- Car park, at the military commander's body
F2- At the entrance from Swamps next to the army base, go a bit higher at the beginning of the tunnel, there is a body with a backpack, the backpack has it. Stash info got from the Loner trader.
F3- Info got from the Drifter named d00d. Go to Wolf at the pile of energy drinks, take his quest, do a hardsave in case Drifter dies. Save Drifter from the dogs, escort him back to the village. You need to buy the info from him.
The flashdrive is next to the secret camp, at the fence next to the dead body, in his arms or next to him is a box or backpack, that contains it.

Artifacts :
1- Moonlight
2- Mama's beeds
3- Fireball
4- Stone Flower
5- Nightstar
6- Moonlight
7- Meat chunk
8- Soul

Extra stuff :
1- Concentration camp (Or car cemetary as I call it)
2- Depot (Bandit base)
3- Diggin site
4- Flea market
5- Entrance to Dark Valley
6- Ditto
7- Entrance to Cordon
8- Ditto
9- Entrance to Agroprom

Flash Drives :
F1- At a pile of trash, in a piece of pipe
F2- Behind Flea Market, at the underground place, only aquirable a bit later at a quest
F3- In a backpack at a body
F4- At the side of the pile of trash in a backpack
F5- In a backpack next to a body.

IMPORTANT!!
All these flashdrives' (Except f2) info can only can be aquired from Vasyan, who disappears after your meeting when you leave. You have only 1 chance to get the flashdrives.

Artifacts :
1- Night star
2- Wrenched
3- Soul
4- Wrenched
5- Moonlight

Extra stuff :
1- Freedom base
2- Antenna
3- Farm
4- Factory
5- Entrance to Cordon
6- Entrance to Garbage
7- Entrance to Garbage

Flash Drives
F1- Got from Chehov
F2- Info got from Ganja
F3- Ditto

Artifacts :
1- Moonlight
2- Nightstar
3- Soul
4- Nightstar
5- Moonlight
6- Moonlight

Extra crap :
1- Train tunnel
2- Loner base
3- Duty base
4- Swamps

Flashdrives
(Written with numbers now)
5- Info from Krilov
6- Info from Duty trader
7- Info from Zvyagintsev
8- Info from Hermit (Dutier guy at the entrance who also gives a SPAS shotgun)

Artifacts :
1- Eye
2- Kolobok
3- Moonlight
4- Shell

Extra Crap
1- Shakarov in his soupcan
2- Dead stalker's PDA
3- Factory's attack's beginning

Artifacts
1- Eye
2- Wrenched
3- Snow thing
4- Battery
5- Gravi
6- Wrenched
7- Wrenched

Extras
1- Bridge to Limanks
2- SOS Signal
3- Tunnel to the forest thing
4- Tank with space anomaly
5- Closed gate
6- Forester
7- Tunnel where the compass and a Bulldog 6 hides.

Artifacts
1- Wrenched
2- Shell
3- Eye
4- Wrenched
5- Bubble

Extras
1- Millitary base
2- Entrance to Red Forest
3- Bloodsucker village
4- Village's tower

Sidorovich gives the best price for artifacts, Shakarov gives the second best price.