The wasteland was filled with abandoned towns, dead towns. Even the zombies did not leave their homes. They were waiting for the arrival of people. And people came back of course because survival in the desert is challenging. You need food and weapons, so you entered the town to find them. You have a weapon now you must fight to survive. Collect weapons and repel the waves of zombies.
Control keys:
F - Pick up weapons, ammo
1,2,3 ... Change weapons
WASD - Character movement
SPACEBAR - Jump
SHIFT - Sprint
Esc - Exit to the menu
LKM - Shoot