Left 4 Dead: Gemini Strain.

Chapter III: Protected No More – Russell

It was amazing how fast they moved to him. In his mind he used to think of the living dead as slow, stumbling creatures, but what he saw in the alley below him was simply horrifying. All he could do was fire randomly into the crowd with his 1/6th STEYR AUG-A1 ( 77) Assault Rifle and pray that he was doing the damage that he wanted too. Suddenly there was a whistle and the man sitting next to him grabbed his shoulder.
"It's time to go in kid."
Russell continued to fire until he had emptied his clip. His eyes were wide behind his glasses and he was breathing heavily. He watched as the infected still moved on the ground after he had downed them, watched as they continued to bleed away a life that should not have been, watched as the one's that he had killed not move a muscle.
"We can still kill them...we have a chance. We have a chance!" Russell dropped his head, his black bangs falling in front of his face. "I have a chance."
The man next to him stood up and looked down at the kneeling Russell. "It's not the time to be losing it kid. Especially with my ass on the line. If you go postal on my squad then Sarge'll have my ass." Russell looked up at him and for the first time realized that the man before him wasn't just WEARING his army fatigues. It was like the last two nights had been a dream and he had just woken up. His grip tightened on his gun and he also stood after removing a replacement clip from the lower pocket of his cargo pants. He removed the empty one from his gun and placed it in the pocket lowest on his left leg, then slid the full clip home forcing a smile. The two then turned and headed for the door that would take them back down into the building.