Left 4 Dead: Gemini Strain.

Chapter IV: The Thoughtful Killer – Adam

Immediately upon hearing gunshots I crouched down and closed my eyes. You might consider me a coward but I just call it instinct. I forgot where I stood that I had every opportunity to fire at the men and stand stoically by Latvia. I suppose one could only imagine my surprise once I opened my eyes and noticed three dead men and a woman crouching down beside me in the same manner I had been. I did not say anything to her; I was in no position to at this point.
The men were dispatched clean. Three single bullet wounds to all of these bastards located in their skull. I was shocked. I continued to be more shocked as footsteps sounded from behind me coming closer and then appearing as they pivoted to examine the bodies. The man had a cocky smirk on his face that was chilling to the spine. He began to stare at his bodies in amusement, looking each one up and down as if he now decided that they needed to be sized up.
As he took the time to search the men for anything useful (already shoving the firearms inside the safe room) I took my own to burn the image of this man into my mind. He was a lanky fellow, his blonde hair was almost cut to the scalp which only made his gaunt face a lot more evident. He was dressed in army pants and from what I could see combat boots. He wore only a black tank top on his chest that heightened the sense of his own frailty. The thing was, even with all this from what I saw I immediately knew he was a dangerous individual. His eyes, cold blue and piercing, lazily looked at us was all the evidence I needed.
His smile never faltered when he began to look at us. Hopefully he wasn't sizing us.
He laughed suddenly. A deep, long, uncomfortable laugh. When he spoke to us and ushered his hand to the room I trembled.
"Are you two coming in?"