After living underground for several days you ran out of supplies, and you must go get them. They can only be exchanged for cartridges. Again, you need to rise to the surface in the ruined city and pick up nasty stuff. Do not forget, the city is teeming with mercenaries. Kill the mercenaries, collect ammunition and stay alive.

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