Head down the staircase to the underground garage

You go down the concrete steps to the underground parking garage. It's pitch black down here, you can hardly see! You can feel the vast empty space all around you, and a slight breeze ruffles your hair. The sound of fucking echo throughout the garage, and something stumbles near you, making you jump. It seems the infected are having just as hard of a time seeing as you do! This might not be as dangerous a place as you might have thought.

Suddenly, you hear the sound of gunfire from deeper in the garage, and its muzzle flashes light the whole place up for a split second, revealing the dozens of infected stumbling about between rusty cars and concrete pillars. They cry out, shouting, several more shots ringing in your ears. Whoever it is, they need help!