Near a large metropolis, a military transport aircraft carrying a chemical weapon crashed. All these poisonous substances got into the atmosphere and spilled onto the city together with the rain. Many people died and turned into monsters. You in the game Unusual Rain as part of the regular army will have to enter the city and save the surviving civilians from monsters. Wandering through the city streets your character will be constantly attacked by monsters. Therefore, be careful and when you see the enemy you aim your gun at him. When ready, open fire to defeat. Do not let the enemy come near you otherwise they will tear you to pieces. Monitor the level of ammunition and recharge the weapon in time. Also, use first-aid kits to replenish your health.