In the first location of ATOM RPG you can get an item that makes it easier for you to get raw materials and weapons. It is a golden walnut, which you can sell for over 300 rubs.
How to get a golden walnut?
To get a golden walnut you have to defeat a rat located in a hut in Ostradnoye.
On the right side of the city you can find an abandoned hut. Here you will find a shelter.
In the cottage you will find a light switch, when you turn it on, a flap will appear on the floor. Then you will be able to move the bed and get to the flap. Remember to turn off the light before entering the shelter. Otherwise the rat will not appear.
Open the flap and go down to the shelter hidden under the cottage.
Next up is How to Kill a Rat?