Full list of worthy rewards from quest givers.

242 on 6/8/2008 at 16:10

For everyone interested, I compiled this list by using the excellent Stalker Encyclopedia I wrote about in the "Getting ridiculously owned" thread.
From the left is what you get, from the right is the quest you have to accomplish. To get a needed quest, you may accept preceding quests and then just discard them if you wish until you get to the sought-for one.
By "worthy rewards" I mean either valued or unique weapon, armor, or top-of-the-line artifact.

CORDON

Sidorovich
============
Tourist's Suit (Stalker's Suit allowing to carry up to 70kg) - Night star, only after X18.
Slime - kill stalker named "Demon", only after X18 (?)
Kolobok - kill Father Diodor, only after X18 (?)

BAR

Barkeep
============
"Berill" Suit - Night star
LR300+SUSAT+silencer+M203 - Golden fish
Soul - kill stalker
Moonlight - kill stalker named "Sparrow"

Hunter
============
Battery - kill bloodsuckers near water-tower in Army Warehouses (it's possible to get endless amount of Batteries as the quest will be restarted eventually)

Baldy
============
Night star - kill traitor

Informer
============
Mama's beads - kill stalker-master

General Voronin
============
OC14 Groza - kill stalker named Poke
Sniper VAL - wipe out Freedom camp
VSS Vintorez - deliver sniper LR300 from mercenaries' camp
PSZ-9Md "Universal Defense" suit - deliver grenade launcher RG-6 from Army Warehouses

Colonel Petrenko
============
PSZ-9Md "Universal Defense" suit - kill stalker-traitor in Freedom base

YANTAR

Sakharov
============
Pelicle - Fireball
SEVA suit - Urchin
SSP-99M suit - deliver Ghost's suit

ARMY WAREHOUSES

Codger
============
Crystal - kill all bloodsuckers in the village

Lukash
============
Urchin - kill neutral stalker
Urchin - protect Border
Crystal - protect stalkers in Agroprom
SIG550+M203 - kill all bloodsuckers in the village
"Freedom Guard" suit - deliver body armour

D'Arcy on 6/8/2008 at 22:16

All this information and much more are available in The Zone Survival Guide, although the site seems to be down at the moment.

242 on 7/8/2008 at 11:18

Well, I threw away trivial rewards and posted the list here for convenience. Maybe it will help someone to get something he/she wanted to look at/use but couldn't find "in the field". F.e. I didn't know that Sidorovich gave Kolobok as a reward.