Stalker: Call of Pripyat → Quests → Supplies
A mercenary squad has set up camp at the substation and won't let anyone in. What a mess. However, there is a way to gain entry. The mercenary leader, Tesak, asks us to bring them food. Six cans of preserves, some sausage, or some loaves of bread will do.
We calmly enter the mercenary camp, and once we pass through the construction site and reach the place where the mercenaries are resting, we'll find tools for rough work.
Source: gamer.ru
See also:
Terraria. Floating Islands,
Fallout Tactics: Scott City,
Chemistry. Isomerism and its types